2121203113101 has 16 divisors (see below), whose sum is σ = 3143025141120. Its totient is φ = 1413909504000.

The previous prime is 2121203113097. The next prime is 2121203113103. The reversal of 2121203113101 is 1013113021212.

2121203113101 is a `hidden beast` number, since 2 + 1 + 21 + 20 + 311 + 310 + 1 = 666.

It is not a de Polignac number, because 2121203113101 - 2² = 2121203113097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121203113103) 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, 6102900 + ... + 6441101.

It is an arithmetic number, because the mean of its divisors is an integer number (196439071320).

Almost surely, 2^{2121203113101} is an apocalyptic number.

It is an amenable number.

2121203113101 is a deficient number, since it is larger than the sum of its proper divisors (1021822028019).

2121203113101 is a wasteful number, since it uses less digits than its factorization.

2121203113101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12550273 (or 12550267 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2121203113101 its reverse (1013113021212), we get a palindrome (3134316134313).

The spelling of 2121203113101 in words is "two trillion, one hundred twenty-one billion, two hundred three million, one hundred thirteen thousand, one hundred one".