312111013 has 4 divisors (see below), whose sum is σ = 312348960. Its totient is φ = 311873068.

The previous prime is 312110993. The next prime is 312111029. The reversal of 312111013 is 310111213.

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-312111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312110984 and 312111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111053) 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, 116995 + ... + 119632.

It is an arithmetic number, because the mean of its divisors is an integer number (78087240).

Almost surely, 2^312111013 is an apocalyptic number.

It is an amenable number.

312111013 is a deficient number, since it is larger than the sum of its proper divisors (237947).

312111013 is a wasteful number, since it uses less digits than its factorization.

312111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237946.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 312111013 is about 17666.6638899369. The cubic root of 312111013 is about 678.3227210631.

Adding to 312111013 its reverse (310111213), we get a palindrome (622222226).

The spelling of 312111013 in words is "three hundred twelve million, one hundred eleven thousand, thirteen".