221210210121000 has 128 divisors (see below), whose sum is σ = 696507745190400. Its totient is φ = 58448202220800.

The previous prime is 221210210120987. The next prime is 221210210121023. The reversal of 221210210121000 is 121012012122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337914912 + ... + 338568911.

It is an arithmetic number, because the mean of its divisors is an integer number (5441466759300).

Almost surely, 2^{221210210121000} is an apocalyptic number.

221210210121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210210121000 is an abundant number, since it is smaller than the sum of its proper divisors (475297535069400).

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

221210210121000 is a wasteful number, since it uses less digits than its factorization.

221210210121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676483956 (or 676483942 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221210210121000 its reverse (121012012122), we get a palindrome (221331222133122).

The spelling of 221210210121000 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred ten million, one hundred twenty-one thousand".