31311211100213 has 8 divisors (see below), whose sum is σ = 34158939070656. Its totient is φ = 28463692168800.

The previous prime is 31311211100203. The next prime is 31311211100249. The reversal of 31311211100213 is 31200111211313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31311211100213 - 2²⁴ = 31311194322997 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 (31311211100203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51946481 + ... + 52545782.

It is an arithmetic number, because the mean of its divisors is an integer number (4269867383832).

Almost surely, 2^{31311211100213} is an apocalyptic number.

It is an amenable number.

31311211100213 is a deficient number, since it is larger than the sum of its proper divisors (2847727970443).

31311211100213 is a wasteful number, since it uses less digits than its factorization.

31311211100213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104519515.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31311211100213 its reverse (31200111211313), we get a palindrome (62511322311526).

It can be divided in two parts, 31311211100 and 213, that added together give a palindrome (31311211313).

The spelling of 31311211100213 in words is "thirty-one trillion, three hundred eleven billion, two hundred eleven million, one hundred thousand, two hundred thirteen".