15240120012 has 36 divisors (see below), whose sum is σ = 41486994640. Its totient is φ = 4689267552.

The previous prime is 15240120011. The next prime is 15240120019. The reversal of 15240120012 is 21002104251.

15240120012 is a `hidden beast` number, since 1 + 52 + 401 + 200 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×15240120012² (a number of 21 digits) contains 22 as substring.

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 (15240120011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16281712 + ... + 16282647.

Almost surely, 2^15240120012 is an apocalyptic number.

15240120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15240120012 is an abundant number, since it is smaller than the sum of its proper divisors (26246874628).

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

15240120012 is a wasteful number, since it uses less digits than its factorization.

15240120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32564382 (or 32564377 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 15240120012 its reverse (21002104251), we get a palindrome (36242224263).

The spelling of 15240120012 in words is "fifteen billion, two hundred forty million, one hundred twenty thousand, twelve".