31213311311 has 16 divisors (see below), whose sum is σ = 38942643264. Its totient is φ = 24357936384.

The previous prime is 31213311277. The next prime is 31213311317. The reversal of 31213311311 is 11311331213.

It is a cyclic number.

It is not a de Polignac number, because 31213311311 - 2¹⁴ = 31213294927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213311317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2342696 + ... + 2355981.

It is an arithmetic number, because the mean of its divisors is an integer number (2433915204).

Almost surely, 2^31213311311 is an apocalyptic number.

31213311311 is a deficient number, since it is larger than the sum of its proper divisors (7729331953).

31213311311 is a wasteful number, since it uses less digits than its factorization.

31213311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698770.

The product of its digits is 162, while the sum is 20.

Adding to 31213311311 its reverse (11311331213), we get a palindrome (42524642524).

The spelling of 31213311311 in words is "thirty-one billion, two hundred thirteen million, three hundred eleven thousand, three hundred eleven".