2100031101103 has 4 divisors (see below), whose sum is σ = 2261571955048. Its totient is φ = 1938490247160.

The previous prime is 2100031101067. The next prime is 2100031101109. The reversal of 2100031101103 is 3011011300012.

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 2100031101103 - 2²¹ = 2100029003951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 161540853931 = 2100031101103 / (2 + 1 + 0 + 0 + 0 + 3 + 1 + 1 + 0 + 1 + 1 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100031101109) 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, 80770426953 + ... + 80770426978.

It is an arithmetic number, because the mean of its divisors is an integer number (565392988762).

Almost surely, 2^{2100031101103} is an apocalyptic number.

2100031101103 is a deficient number, since it is larger than the sum of its proper divisors (161540853945).

2100031101103 is a wasteful number, since it uses less digits than its factorization.

2100031101103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161540853944.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 2100031101103 its reverse (3011011300012), we get a palindrome (5111042401115).

The spelling of 2100031101103 in words is "two trillion, one hundred billion, thirty-one million, one hundred one thousand, one hundred three".