2031113121 has 4 divisors (see below), whose sum is σ = 2708150832. Its totient is φ = 1354075412.

The previous prime is 2031113111. The next prime is 2031113153. The reversal of 2031113121 is 1213111302.

It is a happy number.

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 2031113121 - 2⁵ = 2031113089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2031113121.

It is not an unprimeable number, because it can be changed into a prime (2031113101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338518851 + ... + 338518856.

It is an arithmetic number, because the mean of its divisors is an integer number (677037708).

Almost surely, 2^2031113121 is an apocalyptic number.

It is an amenable number.

2031113121 is a deficient number, since it is larger than the sum of its proper divisors (677037711).

2031113121 is an equidigital number, since it uses as much as digits as its factorization.

2031113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677037710.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2031113121 is about 45067.8723815536. The cubic root of 2031113121 is about 1266.4208069063.

Adding to 2031113121 its reverse (1213111302), we get a palindrome (3244224423).

The spelling of 2031113121 in words is "two billion, thirty-one million, one hundred thirteen thousand, one hundred twenty-one".