31013101221203 has 4 divisors (see below), whose sum is σ = 31734336133368. Its totient is φ = 30291866309040.

The previous prime is 31013101221199. The next prime is 31013101221211. The reversal of 31013101221203 is 30212210131013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31013101221203 - 2² = 31013101221199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31013101221253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360617456018 + ... + 360617456103.

It is an arithmetic number, because the mean of its divisors is an integer number (7933584033342).

Almost surely, 2^{31013101221203} is an apocalyptic number.

31013101221203 is a deficient number, since it is larger than the sum of its proper divisors (721234912165).

31013101221203 is an equidigital number, since it uses as much as digits as its factorization.

31013101221203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721234912164.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31013101221203 its reverse (30212210131013), we get a palindrome (61225311352216).

The spelling of 31013101221203 in words is "thirty-one trillion, thirteen billion, one hundred one million, two hundred twenty-one thousand, two hundred three".