10215621100 has 18 divisors (see below), whose sum is σ = 22167898004. Its totient is φ = 4086248400.

The previous prime is 10215621043. The next prime is 10215621121. The reversal of 10215621100 is 112651201.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51078006 + ... + 51078205.

Almost surely, 2^10215621100 is an apocalyptic number.

10215621100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10215621100 is an abundant number, since it is smaller than the sum of its proper divisors (11952276904).

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

10215621100 is a wasteful number, since it uses less digits than its factorization.

10215621100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102156225 (or 102156218 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

It can be divided in two parts, 102156 and 21100, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 10215621100 in words is "ten billion, two hundred fifteen million, six hundred twenty-one thousand, one hundred".