15212045121 has 32 divisors (see below), whose sum is σ = 24971735040. Its totient is φ = 8021242944.

The previous prime is 15212045119. The next prime is 15212045153. The reversal of 15212045121 is 12154021251.

It is a happy number.

It is not a de Polignac number, because 15212045121 - 2¹ = 15212045119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15212045091 and 15212045100.

It is not an unprimeable number, because it can be changed into a prime (15212045161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1007796 + ... + 1022778.

It is an arithmetic number, because the mean of its divisors is an integer number (780366720).

Almost surely, 2^15212045121 is an apocalyptic number.

It is an amenable number.

15212045121 is a deficient number, since it is larger than the sum of its proper divisors (9759689919).

15212045121 is a wasteful number, since it uses less digits than its factorization.

15212045121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18725.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 15212045121 its reverse (12154021251), we get a palindrome (27366066372).

The spelling of 15212045121 in words is "fifteen billion, two hundred twelve million, forty-five thousand, one hundred twenty-one".