21150102120 has 128 divisors (see below), whose sum is σ = 74201149440. Its totient is φ = 4721875200.

The previous prime is 21150102013. The next prime is 21150102137. The reversal of 21150102120 is 2120105112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21150102120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256656 + ... + 328895.

It is an arithmetic number, because the mean of its divisors is an integer number (579696480).

Almost surely, 2^21150102120 is an apocalyptic number.

21150102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21150102120 is an abundant number, since it is smaller than the sum of its proper divisors (53051047320).

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

21150102120 is a wasteful number, since it uses less digits than its factorization.

21150102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585615 (or 585611 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 21150102120 its reverse (2120105112), we get a palindrome (23270207232).

The spelling of 21150102120 in words is "twenty-one billion, one hundred fifty million, one hundred two thousand, one hundred twenty".