120021200 has 60 divisors (see below), whose sum is σ = 310545228. Its totient is φ = 44313600.

The previous prime is 120021197. The next prime is 120021211. The reversal of 120021200 is 2120021.

It can be written as a sum of positive squares in 6 ways, for example, as 13601344 + 106419856 = 3688^2 + 10316^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6341 + ... + 16740.

Almost surely, 2^120021200 is an apocalyptic number.

120021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021200 is an abundant number, since it is smaller than the sum of its proper divisors (190524028).

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

120021200 is a wasteful number, since it uses less digits than its factorization.

120021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23112 (or 23101 counting only the distinct ones).

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

The square root of 120021200 is about 10955.4187505544. The cubic root of 120021200 is about 493.2714596535.

Adding to 120021200 its reverse (2120021), we get a palindrome (122141221).

The spelling of 120021200 in words is "one hundred twenty million, twenty-one thousand, two hundred".