312130220121 has 32 divisors (see below), whose sum is σ = 464687731200. Its totient is φ = 207066637440.

The previous prime is 312130220107. The next prime is 312130220167. The reversal of 312130220121 is 121022031213.

312130220121 is a `hidden beast` number, since 312 + 13 + 0 + 220 + 121 = 666.

It is not a de Polignac number, because 312130220121 - 2¹⁰ = 312130219097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312130220094 and 312130220103.

It is not an unprimeable number, because it can be changed into a prime (312130220021) 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, 4533885 + ... + 4602213.

It is an arithmetic number, because the mean of its divisors is an integer number (14521491600).

Almost surely, 2^312130220121 is an apocalyptic number.

It is an amenable number.

312130220121 is a deficient number, since it is larger than the sum of its proper divisors (152557511079).

312130220121 is a wasteful number, since it uses less digits than its factorization.

312130220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69166 (or 69160 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 312130220121 its reverse (121022031213), we get a palindrome (433152251334).

The spelling of 312130220121 in words is "three hundred twelve billion, one hundred thirty million, two hundred twenty thousand, one hundred twenty-one".