31020120222213 has 8 divisors (see below), whose sum is σ = 41556180014176. Its totient is φ = 20582070289200.

The previous prime is 31020120222167. The next prime is 31020120222251. The reversal of 31020120222213 is 31222202102013.

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

It is not a de Polignac number, because 31020120222213 - 2¹² = 31020120218117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31020120222213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020120222613) 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, 24502463998 + ... + 24502465263.

It is an arithmetic number, because the mean of its divisors is an integer number (5194522501772).

Almost surely, 2^{31020120222213} is an apocalyptic number.

It is an amenable number.

31020120222213 is a deficient number, since it is larger than the sum of its proper divisors (10536059791963).

31020120222213 is a wasteful number, since it uses less digits than its factorization.

31020120222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49004929475.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31020120222213 its reverse (31222202102013), we get a palindrome (62242322324226).

The spelling of 31020120222213 in words is "thirty-one trillion, twenty billion, one hundred twenty million, two hundred twenty-two thousand, two hundred thirteen".