21123200111233 has 16 divisors (see below), whose sum is σ = 23628423676032. Its totient is φ = 18716373904000.

The previous prime is 21123200111219. The next prime is 21123200111243. The reversal of 21123200111233 is 33211100232112.

It is a cyclic number.

It is not a de Polignac number, because 21123200111233 - 2⁹ = 21123200110721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123200111203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22249066 + ... + 23179027.

It is an arithmetic number, because the mean of its divisors is an integer number (1476776479752).

Almost surely, 2^{21123200111233} is an apocalyptic number.

It is an amenable number.

21123200111233 is a deficient number, since it is larger than the sum of its proper divisors (2505223564799).

21123200111233 is a wasteful number, since it uses less digits than its factorization.

21123200111233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45429176.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21123200111233 its reverse (33211100232112), we get a palindrome (54334300343345).

The spelling of 21123200111233 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred million, one hundred eleven thousand, two hundred thirty-three".