31323213021113 has 32 divisors (see below), whose sum is σ = 34816541316480. Its totient is φ = 27995523632640.

The previous prime is 31323213021077. The next prime is 31323213021143. The reversal of 31323213021113 is 31112031232313.

It is a cyclic number.

It is not a de Polignac number, because 31323213021113 - 2³⁶ = 31254493544377 is a prime.

It is a super-2 number, since 2×31323213021113² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323213021143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210110306 + ... + 210259332.

It is an arithmetic number, because the mean of its divisors is an integer number (1088016916140).

Almost surely, 2^{31323213021113} is an apocalyptic number.

It is an amenable number.

31323213021113 is a deficient number, since it is larger than the sum of its proper divisors (3493328295367).

31323213021113 is a wasteful number, since it uses less digits than its factorization.

31323213021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152057.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31323213021113 its reverse (31112031232313), we get a palindrome (62435244253426).

The spelling of 31323213021113 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred thirteen million, twenty-one thousand, one hundred thirteen".