15120212112 has 80 divisors (see below), whose sum is σ = 43424800000. Its totient is φ = 5037261696.

The previous prime is 15120212111. The next prime is 15120212117. The reversal of 15120212112 is 21121202151.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (15120212111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854814 + ... + 872322.

It is an arithmetic number, because the mean of its divisors is an integer number (542810000).

Almost surely, 2^15120212112 is an apocalyptic number.

15120212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15120212112 is an abundant number, since it is smaller than the sum of its proper divisors (28304587888).

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

15120212112 is a wasteful number, since it uses less digits than its factorization.

15120212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19525 (or 19513 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 15120212112 its reverse (21121202151), we get a palindrome (36241414263).

The spelling of 15120212112 in words is "fifteen billion, one hundred twenty million, two hundred twelve thousand, one hundred twelve".