31122212313 has 8 divisors (see below), whose sum is σ = 41736146688. Its totient is φ = 20628209744.

The previous prime is 31122212311. The next prime is 31122212347. The reversal of 31122212313 is 31321222113.

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 31122212313 - 2¹ = 31122212311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31122212313.

It is not an unprimeable number, because it can be changed into a prime (31122212311) 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, 29982345 + ... + 29983382.

It is an arithmetic number, because the mean of its divisors is an integer number (5217018336).

Almost surely, 2^31122212313 is an apocalyptic number.

It is an amenable number.

31122212313 is a deficient number, since it is larger than the sum of its proper divisors (10613934375).

31122212313 is a wasteful number, since it uses less digits than its factorization.

31122212313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59965903.

The product of its digits is 432, while the sum is 21.

Adding to 31122212313 its reverse (31321222113), we get a palindrome (62443434426).

The spelling of 31122212313 in words is "thirty-one billion, one hundred twenty-two million, two hundred twelve thousand, three hundred thirteen".