2100031113331 has 4 divisors (see below), whose sum is σ = 2100039355872. Its totient is φ = 2100022870792.

The previous prime is 2100031113311. The next prime is 2100031113377. The reversal of 2100031113331 is 1333111300012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100031113331 is a prime.

It is a super-2 number, since 2×2100031113331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100031113299 and 2100031113308.

It is not an unprimeable number, because it can be changed into a prime (2100031113311) 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, 3726496 + ... + 4252861.

It is an arithmetic number, because the mean of its divisors is an integer number (525009838968).

Almost surely, 2^{2100031113331} is an apocalyptic number.

2100031113331 is a deficient number, since it is larger than the sum of its proper divisors (8242541).

2100031113331 is an equidigital number, since it uses as much as digits as its factorization.

2100031113331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242540.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 2100031113331 its reverse (1333111300012), we get a palindrome (3433142413343).

The spelling of 2100031113331 in words is "two trillion, one hundred billion, thirty-one million, one hundred thirteen thousand, three hundred thirty-one".