2100120121003 has 16 divisors (see below), whose sum is σ = 2191240512000. Its totient is φ = 2010321336352.

The previous prime is 2100120120997. The next prime is 2100120121039. The reversal of 2100120121003 is 3001210210012.

It is a cyclic number.

It is not a de Polignac number, because 2100120121003 - 2²⁹ = 2099583250091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100120121093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905928 + ... + 2240746.

It is an arithmetic number, because the mean of its divisors is an integer number (136952532000).

Almost surely, 2^{2100120121003} is an apocalyptic number.

2100120121003 is a deficient number, since it is larger than the sum of its proper divisors (91120390997).

2100120121003 is a wasteful number, since it uses less digits than its factorization.

2100120121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335314.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2100120121003 its reverse (3001210210012), we get a palindrome (5101330331015).

The spelling of 2100120121003 in words is "two trillion, one hundred billion, one hundred twenty million, one hundred twenty-one thousand, three".