21123332113 has 16 divisors (see below), whose sum is σ = 23168642112. Its totient is φ = 19139400000.

The previous prime is 21123332101. The next prime is 21123332117. The reversal of 21123332113 is 31123332112.

It is a cyclic number.

It is not a de Polignac number, because 21123332113 - 2⁵ = 21123332081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123332117) 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, 362238 + ... + 416488.

It is an arithmetic number, because the mean of its divisors is an integer number (1448040132).

Almost surely, 2^21123332113 is an apocalyptic number.

It is an amenable number.

21123332113 is a deficient number, since it is larger than the sum of its proper divisors (2045309999).

21123332113 is a wasteful number, since it uses less digits than its factorization.

21123332113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54816.

The product of its digits is 648, while the sum is 22.

Adding to 21123332113 its reverse (31123332112), we get a palindrome (52246664225).

Subtracting 21123332113 from its reverse (31123332112), we obtain a palindrome (9999999999).

The spelling of 21123332113 in words is "twenty-one billion, one hundred twenty-three million, three hundred thirty-two thousand, one hundred thirteen".