211312123031013 has 4 divisors (see below), whose sum is σ = 281749497374688. Its totient is φ = 140874748687340.

The previous prime is 211312123030949. The next prime is 211312123031027. The reversal of 211312123031013 is 310130321213112.

211312123031013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211312123031013 - 2⁶ = 211312123030949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211312123031413) 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, 35218687171833 + ... + 35218687171838.

It is an arithmetic number, because the mean of its divisors is an integer number (70437374343672).

Almost surely, 2^{211312123031013} is an apocalyptic number.

It is an amenable number.

211312123031013 is a deficient number, since it is larger than the sum of its proper divisors (70437374343675).

211312123031013 is an equidigital number, since it uses as much as digits as its factorization.

211312123031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70437374343674.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 211312123031013 its reverse (310130321213112), we get a palindrome (521442444244125).

The spelling of 211312123031013 in words is "two hundred eleven trillion, three hundred twelve billion, one hundred twenty-three million, thirty-one thousand, thirteen".