312212123013 has 16 divisors (see below), whose sum is σ = 496436668416. Its totient is φ = 170650104240.

The previous prime is 312212122991. The next prime is 312212123023. The reversal of 312212123013 is 310321212213.

It is not a de Polignac number, because 312212123013 - 2¹⁶ = 312212057477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312212123023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323200473 + ... + 323201438.

It is an arithmetic number, because the mean of its divisors is an integer number (31027291776).

Almost surely, 2^312212123013 is an apocalyptic number.

It is an amenable number.

312212123013 is a deficient number, since it is larger than the sum of its proper divisors (184224545403).

312212123013 is a wasteful number, since it uses less digits than its factorization.

312212123013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646401944.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312212123013 its reverse (310321212213), we get a palindrome (622533335226).

The spelling of 312212123013 in words is "three hundred twelve billion, two hundred twelve million, one hundred twenty-three thousand, thirteen".