31213300211 has 6 divisors (see below), whose sum is σ = 33157381500. Its totient is φ = 29377223456.

The previous prime is 31213300189. The next prime is 31213300289. The reversal of 31213300211 is 11200331213.

It is not a de Polignac number, because 31213300211 - 2²⁶ = 31146191347 is a prime.

It is a super-2 number, since 2×31213300211² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31213300211.

It is not an unprimeable number, because it can be changed into a prime (31213303211) 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 5 ways as a sum of consecutive naturals, for example, 54001961 + ... + 54002538.

It is an arithmetic number, because the mean of its divisors is an integer number (5526230250).

Almost surely, 2^31213300211 is an apocalyptic number.

31213300211 is a deficient number, since it is larger than the sum of its proper divisors (1944081289).

31213300211 is a wasteful number, since it uses less digits than its factorization.

31213300211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108004533 (or 108004516 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31213300211 its reverse (11200331213), we get a palindrome (42413631424).

The spelling of 31213300211 in words is "thirty-one billion, two hundred thirteen million, three hundred thousand, two hundred eleven".