21101122031013 has 12 divisors (see below), whose sum is σ = 30600830359008. Its totient is φ = 14011369209000.

The previous prime is 21101122030973. The next prime is 21101122031023. The reversal of 21101122031013 is 31013022110112.

21101122031013 is a `hidden beast` number, since 2 + 110 + 11 + 220 + 310 + 13 = 666.

It is not a de Polignac number, because 21101122031013 - 2⁶ = 21101122030949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101122031023) 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, 4670454145 + ... + 4670458662.

It is an arithmetic number, because the mean of its divisors is an integer number (2550069196584).

Almost surely, 2^{21101122031013} is an apocalyptic number.

It is an amenable number.

21101122031013 is a deficient number, since it is larger than the sum of its proper divisors (9499708327995).

21101122031013 is a wasteful number, since it uses less digits than its factorization.

21101122031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9340913064 (or 9340913061 counting only the distinct ones).

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

Adding to 21101122031013 its reverse (31013022110112), we get a palindrome (52114144141125).

The spelling of 21101122031013 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, thirty-one thousand, thirteen".