315112121 has 4 divisors (see below), whose sum is σ = 328812672. Its totient is φ = 301411572.

The previous prime is 315112099. The next prime is 315112141. The reversal of 315112121 is 121211513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315112121 is a prime.

It is a super-2 number, since 2×315112121² = 198591297602237282, which contains 22 as substring.

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 315112121.

It is not an unprimeable number, because it can be changed into a prime (315112141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6850241 + ... + 6850286.

It is an arithmetic number, because the mean of its divisors is an integer number (82203168).

Almost surely, 2^315112121 is an apocalyptic number.

It is an amenable number.

315112121 is a deficient number, since it is larger than the sum of its proper divisors (13700551).

315112121 is a wasteful number, since it uses less digits than its factorization.

315112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13700550.

The product of its digits is 60, while the sum is 17.

The square root of 315112121 is about 17751.3977196163. The cubic root of 315112121 is about 680.4899302320.

Adding to 315112121 its reverse (121211513), we get a palindrome (436323634).

The spelling of 315112121 in words is "three hundred fifteen million, one hundred twelve thousand, one hundred twenty-one".