120621900 has 144 divisors (see below), whose sum is σ = 404974080. Its totient is φ = 27148800.

The previous prime is 120621889. The next prime is 120621911. The reversal of 120621900 is 9126021.

It is an interprime number because it is at equal distance from previous prime (120621889) and next prime (120621911).

It is a super-2 number, since 2×120621900² = 29099285519220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148696 + ... + 149504.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^120621900 is an apocalyptic number.

120621900 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 120621900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202487040).

120621900 is an abundant number, since it is smaller than the sum of its proper divisors (284352180).

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

120621900 is a wasteful number, since it uses less digits than its factorization.

120621900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 120621900 is about 10982.8001893870. The cubic root of 120621900 is about 494.0930233995.

Adding to 120621900 its reverse (9126021), we get a palindrome (129747921).

The spelling of 120621900 in words is "one hundred twenty million, six hundred twenty-one thousand, nine hundred".