2100122100121 has 16 divisors (see below), whose sum is σ = 2203997558400. Its totient is φ = 1997297091328.

The previous prime is 2100122100049. The next prime is 2100122100143. The reversal of 2100122100121 is 1210012210012.

It is a cyclic number.

It is not a de Polignac number, because 2100122100121 - 2⁷ = 2100122099993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100122130121) 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, 31210305 + ... + 31277521.

It is an arithmetic number, because the mean of its divisors is an integer number (137749847400).

Almost surely, 2^{2100122100121} is an apocalyptic number.

It is an amenable number.

2100122100121 is a deficient number, since it is larger than the sum of its proper divisors (103875458279).

2100122100121 is a wasteful number, since it uses less digits than its factorization.

2100122100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75008.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2100122100121 its reverse (1210012210012), we get a palindrome (3310134310133).

The spelling of 2100122100121 in words is "two trillion, one hundred billion, one hundred twenty-two million, one hundred thousand, one hundred twenty-one".