31201312213 has 8 divisors (see below), whose sum is σ = 32845151520. Its totient is φ = 29557639440.

The previous prime is 31201312211. The next prime is 31201312217. The reversal of 31201312213 is 31221310213.

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 31201312213 - 2¹ = 31201312211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201312211) 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, 584658 + ... + 635788.

It is an arithmetic number, because the mean of its divisors is an integer number (4105643940).

Almost surely, 2^31201312213 is an apocalyptic number.

It is an amenable number.

31201312213 is a deficient number, since it is larger than the sum of its proper divisors (1643839307).

31201312213 is a wasteful number, since it uses less digits than its factorization.

31201312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83267.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31201312213 its reverse (31221310213), we get a palindrome (62422622426).

The spelling of 31201312213 in words is "thirty-one billion, two hundred one million, three hundred twelve thousand, two hundred thirteen".