315502242121 has 32 divisors (see below), whose sum is σ = 352815906816. Its totient is φ = 279728064000.

The previous prime is 315502242119. The next prime is 315502242137. The reversal of 315502242121 is 121242205513.

It is a happy number.

It is not a de Polignac number, because 315502242121 - 2¹ = 315502242119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315502242121.

It is not an unprimeable number, because it can be changed into a prime (315502242721) 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, 35008506 + ... + 35017516.

It is an arithmetic number, because the mean of its divisors is an integer number (11025497088).

Almost surely, 2^315502242121 is an apocalyptic number.

It is an amenable number.

315502242121 is a deficient number, since it is larger than the sum of its proper divisors (37313664695).

315502242121 is a wasteful number, since it uses less digits than its factorization.

315502242121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9573.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 315502242121 its reverse (121242205513), we get a palindrome (436744447634).

The spelling of 315502242121 in words is "three hundred fifteen billion, five hundred two million, two hundred forty-two thousand, one hundred twenty-one".