15121442512 has 20 divisors (see below), whose sum is σ = 31961231136. Its totient is φ = 6873382880.

The previous prime is 15121442509. The next prime is 15121442513. The reversal of 15121442512 is 21524412151.

15121442512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121442513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42958468 + ... + 42958819.

Almost surely, 2^15121442512 is an apocalyptic number.

It is an amenable number.

15121442512 is an abundant number, since it is smaller than the sum of its proper divisors (16839788624).

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

15121442512 is a wasteful number, since it uses less digits than its factorization.

15121442512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85917306 (or 85917300 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

Adding to 15121442512 its reverse (21524412151), we get a palindrome (36645854663).

The spelling of 15121442512 in words is "fifteen billion, one hundred twenty-one million, four hundred forty-two thousand, five hundred twelve".