21021120133023 has 32 divisors (see below), whose sum is σ = 28369643544000. Its totient is φ = 13844117016576.

The previous prime is 21021120133009. The next prime is 21021120133099. The reversal of 21021120133023 is 32033102112012.

It is not a de Polignac number, because 21021120133023 - 2⁶ = 21021120132959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021120133003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1444842553 + ... + 1444857101.

It is an arithmetic number, because the mean of its divisors is an integer number (886551360750).

Almost surely, 2^{21021120133023} is an apocalyptic number.

21021120133023 is a deficient number, since it is larger than the sum of its proper divisors (7348523410977).

21021120133023 is a wasteful number, since it uses less digits than its factorization.

21021120133023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27531.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21021120133023 its reverse (32033102112012), we get a palindrome (53054222245035).

The spelling of 21021120133023 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, one hundred thirty-three thousand, twenty-three".