312111013220101 has 4 divisors (see below), whose sum is σ = 314177973572704. Its totient is φ = 310044052867500.

The previous prime is 312111013220099. The next prime is 312111013220143. The reversal of 312111013220101 is 101022310111213.

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 312111013220101 - 2¹ = 312111013220099 is a prime.

It is a super-2 number, since 2×312111013220101² (a number of 30 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 (312111013229101) 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, 1033480176075 + ... + 1033480176376.

It is an arithmetic number, because the mean of its divisors is an integer number (78544493393176).

Almost surely, 2^{312111013220101} is an apocalyptic number.

It is an amenable number.

312111013220101 is a deficient number, since it is larger than the sum of its proper divisors (2066960352603).

312111013220101 is a wasteful number, since it uses less digits than its factorization.

312111013220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066960352602.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 312111013220101 its reverse (101022310111213), we get a palindrome (413133323331314).

The spelling of 312111013220101 in words is "three hundred twelve trillion, one hundred eleven billion, thirteen million, two hundred twenty thousand, one hundred one".