2100110112021 has 16 divisors (see below), whose sum is σ = 3016070013440. Its totient is φ = 1295539161840.

The previous prime is 2100110112017. The next prime is 2100110112041. The reversal of 2100110112021 is 1202110110012.

It is not a de Polignac number, because 2100110112021 - 2² = 2100110112017 is a prime.

It is a super-2 number, since 2×2100110112021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2100110111988 and 2100110112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100110112011) 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, 428416585 + ... + 428421486.

It is an arithmetic number, because the mean of its divisors is an integer number (188504375840).

Almost surely, 2^{2100110112021} is an apocalyptic number.

It is an amenable number.

2100110112021 is a deficient number, since it is larger than the sum of its proper divisors (915959901419).

2100110112021 is a wasteful number, since it uses less digits than its factorization.

2100110112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856838136.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2100110112021 its reverse (1202110110012), we get a palindrome (3302220222033).

The spelling of 2100110112021 in words is "two trillion, one hundred billion, one hundred ten million, one hundred twelve thousand, twenty-one".