2121100232111 has 24 divisors (see below), whose sum is σ = 2493379044000. Its totient is φ = 1798973813952.

The previous prime is 2121100232029. The next prime is 2121100232143. The reversal of 2121100232111 is 1112320011212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2121100232111 is a prime.

It is a super-2 number, since 2×2121100232111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121100232111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100232611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6073265 + ... + 6413013.

It is an arithmetic number, because the mean of its divisors is an integer number (103890793500).

Almost surely, 2^{2121100232111} is an apocalyptic number.

2121100232111 is a deficient number, since it is larger than the sum of its proper divisors (372278811889).

2121100232111 is a wasteful number, since it uses less digits than its factorization.

2121100232111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341103 (or 341096 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121100232111 its reverse (1112320011212), we get a palindrome (3233420243323).

The spelling of 2121100232111 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred thirty-two thousand, one hundred eleven".