311504122212013 has 4 divisors (see below), whose sum is σ = 311504207620288. Its totient is φ = 311504036803740.

The previous prime is 311504122212007. The next prime is 311504122212091. The reversal of 311504122212013 is 310212221405113.

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 311504122212013 - 2¹⁷ = 311504122080941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311504122213013) 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, 36977283 + ... + 44613088.

It is an arithmetic number, because the mean of its divisors is an integer number (77876051905072).

Almost surely, 2^{311504122212013} is an apocalyptic number.

It is an amenable number.

311504122212013 is a deficient number, since it is larger than the sum of its proper divisors (85408275).

311504122212013 is an equidigital number, since it uses as much as digits as its factorization.

311504122212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85408274.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 311504122212013 its reverse (310212221405113), we get a palindrome (621716343617126).

The spelling of 311504122212013 in words is "three hundred eleven trillion, five hundred four billion, one hundred twenty-two million, two hundred twelve thousand, thirteen".