100621120 has 28 divisors (see below), whose sum is σ = 239604804. Its totient is φ = 40248320.

The previous prime is 100621117. The next prime is 100621177. The reversal of 100621120 is 21126001.

It can be written as a sum of positive squares in 2 ways, for example, as 76177984 + 24443136 = 8728^2 + 4944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100621120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156901 + ... + 157540.

Almost surely, 2^100621120 is an apocalyptic number.

100621120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100621120 is an abundant number, since it is smaller than the sum of its proper divisors (138983684).

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

100621120 is an equidigital number, since it uses as much as digits as its factorization.

100621120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314458 (or 314448 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 100621120 is about 10031.0079254280. The cubic root of 100621120 is about 465.1178951076.

Adding to 100621120 its reverse (21126001), we get a palindrome (121747121).

The spelling of 100621120 in words is "one hundred million, six hundred twenty-one thousand, one hundred twenty".