21100002011231 has 12 divisors (see below), whose sum is σ = 24976607595576. Its totient is φ = 17706295392720.

The previous prime is 21100002011219. The next prime is 21100002011267. The reversal of 21100002011231 is 13211020000112.

It is not a de Polignac number, because 21100002011231 - 2⁶ = 21100002011167 is a prime.

It is a super-2 number, since 2×21100002011231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100002011201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6706928501 + ... + 6706931646.

It is an arithmetic number, because the mean of its divisors is an integer number (2081383966298).

Almost surely, 2^{21100002011231} is an apocalyptic number.

21100002011231 is a deficient number, since it is larger than the sum of its proper divisors (3876605584345).

21100002011231 is a wasteful number, since it uses less digits than its factorization.

21100002011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13413860182 (or 13413860171 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21100002011231 its reverse (13211020000112), we get a palindrome (34311022011343).

The spelling of 21100002011231 in words is "twenty-one trillion, one hundred billion, two million, eleven thousand, two hundred thirty-one".