312111320101 has 4 divisors (see below), whose sum is σ = 356698651552. Its totient is φ = 267523988652.

The previous prime is 312111320041. The next prime is 312111320111. The reversal of 312111320101 is 101023111213.

It is a happy number.

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 not a de Polignac number, because 312111320101 - 2¹⁷ = 312111189029 is a prime.

It is a super-2 number, since 2×312111320101² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111320111) 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, 22293665715 + ... + 22293665728.

It is an arithmetic number, because the mean of its divisors is an integer number (89174662888).

Almost surely, 2^312111320101 is an apocalyptic number.

It is an amenable number.

312111320101 is a deficient number, since it is larger than the sum of its proper divisors (44587331451).

312111320101 is an equidigital number, since it uses as much as digits as its factorization.

312111320101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44587331450.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 312111320101 its reverse (101023111213), we get a palindrome (413134431314).

The spelling of 312111320101 in words is "three hundred twelve billion, one hundred eleven million, three hundred twenty thousand, one hundred one".