31023100220113 has 4 divisors (see below), whose sum is σ = 32655894968560. Its totient is φ = 29390305471668.

The previous prime is 31023100220093. The next prime is 31023100220141. The reversal of 31023100220113 is 31102200132013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31023100220113 - 2⁴¹ = 28824076964561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1632794748427 = 31023100220113 / (3 + 1 + 0 + 2 + 3 + 1 + 0 + 0 + 2 + 2 + 0 + 1 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023100220143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816397374195 + ... + 816397374232.

It is an arithmetic number, because the mean of its divisors is an integer number (8163973742140).

Almost surely, 2^{31023100220113} is an apocalyptic number.

It is an amenable number.

31023100220113 is a deficient number, since it is larger than the sum of its proper divisors (1632794748447).

31023100220113 is a wasteful number, since it uses less digits than its factorization.

31023100220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632794748446.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31023100220113 its reverse (31102200132013), we get a palindrome (62125300352126).

The spelling of 31023100220113 in words is "thirty-one trillion, twenty-three billion, one hundred million, two hundred twenty thousand, one hundred thirteen".