31211022011213 has 32 divisors (see below), whose sum is σ = 35194290227712. Its totient is φ = 27432292104000.

The previous prime is 31211022011107. The next prime is 31211022011237.

31211022011213 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31211022011213 - 2¹² = 31211022007117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211022011263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188477270 + ... + 188642792.

It is an arithmetic number, because the mean of its divisors is an integer number (1099821569616).

Almost surely, 2^{31211022011213} is an apocalyptic number.

It is an amenable number.

31211022011213 is a deficient number, since it is larger than the sum of its proper divisors (3983268216499).

31211022011213 is a wasteful number, since it uses less digits than its factorization.

31211022011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169625.

The product of its (nonzero) digits is 144, while the sum is 20.

It can be divided in two parts, 3121102 and 2011213, that added together give a palindrome (5132315).

The spelling of 31211022011213 in words is "thirty-one trillion, two hundred eleven billion, twenty-two million, eleven thousand, two hundred thirteen".