15121543012116 has 24 divisors (see below), whose sum is σ = 35431230495360. Its totient is φ = 5019424318272.

The previous prime is 15121543012099. The next prime is 15121543012187. The reversal of 15121543012116 is 61121034512151.

It is a super-2 number, since 2×15121543012116² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2636249401 + ... + 2636255136.

It is an arithmetic number, because the mean of its divisors is an integer number (1476301270640).

Almost surely, 2^{15121543012116} is an apocalyptic number.

It is an amenable number.

15121543012116 is an abundant number, since it is smaller than the sum of its proper divisors (20309687483244).

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

15121543012116 is a wasteful number, since it uses less digits than its factorization.

15121543012116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5272504783 (or 5272504781 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

Adding to 15121543012116 its reverse (61121034512151), we get a palindrome (76242577524267).

The spelling of 15121543012116 in words is "fifteen trillion, one hundred twenty-one billion, five hundred forty-three million, twelve thousand, one hundred sixteen".