31113321213 has 64 divisors (see below), whose sum is σ = 47362129920. Its totient is φ = 18030988800.

The previous prime is 31113321181. The next prime is 31113321227. The reversal of 31113321213 is 31212331113.

It is a happy number.

It is not a de Polignac number, because 31113321213 - 2⁵ = 31113321181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31113321213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113325213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33855168 + ... + 33856086.

It is an arithmetic number, because the mean of its divisors is an integer number (740033280).

Almost surely, 2^31113321213 is an apocalyptic number.

It is an amenable number.

31113321213 is a deficient number, since it is larger than the sum of its proper divisors (16248808707).

31113321213 is a wasteful number, since it uses less digits than its factorization.

31113321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690.

The product of its digits is 324, while the sum is 21.

Adding to 31113321213 its reverse (31212331113), we get a palindrome (62325652326).

The spelling of 31113321213 in words is "thirty-one billion, one hundred thirteen million, three hundred twenty-one thousand, two hundred thirteen".