31213211113 has 8 divisors (see below), whose sum is σ = 35674763328. Its totient is φ = 26752289424.

The previous prime is 31213211111. The next prime is 31213211177. The reversal of 31213211113 is 31111231213.

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

It is not a de Polignac number, because 31213211113 - 2¹ = 31213211111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213211111) 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, 46306 + ... + 254107.

It is an arithmetic number, because the mean of its divisors is an integer number (4459345416).

Almost surely, 2^31213211113 is an apocalyptic number.

It is an amenable number.

31213211113 is a deficient number, since it is larger than the sum of its proper divisors (4461552215).

31213211113 is a wasteful number, since it uses less digits than its factorization.

31213211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315263.

The product of its digits is 108, while the sum is 19.

Adding to 31213211113 its reverse (31111231213), we get a palindrome (62324442326).

The spelling of 31213211113 in words is "thirty-one billion, two hundred thirteen million, two hundred eleven thousand, one hundred thirteen".