1210210120 has 128 divisors (see below), whose sum is σ = 3207859200. Its totient is φ = 402278400.

The previous prime is 1210210091. The next prime is 1210210151. The reversal of 1210210120 is 210120121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1210210097 and 1210210106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3110886 + ... + 3111274.

It is an arithmetic number, because the mean of its divisors is an integer number (25061400).

Almost surely, 2^1210210120 is an apocalyptic number.

1210210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210210120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603929600).

1210210120 is an abundant number, since it is smaller than the sum of its proper divisors (1997649080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1210210120 is a wasteful number, since it uses less digits than its factorization.

1210210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1210210120 is about 34788.0743933895. The cubic root of 1210210120 is about 1065.6639148335.

Adding to 1210210120 its reverse (210120121), we get a palindrome (1420330241).

It can be divided in two parts, 12102 and 10120, that added together give a palindrome (22222).

The spelling of 1210210120 in words is "one billion, two hundred ten million, two hundred ten thousand, one hundred twenty".