31020113213 has 8 divisors (see below), whose sum is σ = 31460449536. Its totient is φ = 30579872400.

The previous prime is 31020113147. The next prime is 31020113239. The reversal of 31020113213 is 31231102013.

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 31020113213 - 2¹⁶ = 31020047677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020113191 and 31020113200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020113263) 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, 860828 + ... + 896138.

It is an arithmetic number, because the mean of its divisors is an integer number (3932556192).

Almost surely, 2^31020113213 is an apocalyptic number.

It is an amenable number.

31020113213 is a deficient number, since it is larger than the sum of its proper divisors (440336323).

31020113213 is a wasteful number, since it uses less digits than its factorization.

31020113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47755.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31020113213 its reverse (31231102013), we get a palindrome (62251215226).

The spelling of 31020113213 in words is "thirty-one billion, twenty million, one hundred thirteen thousand, two hundred thirteen".