21021120133101 has 24 divisors (see below), whose sum is σ = 33124409872320. Its totient is φ = 12739987972800.

The previous prime is 21021120133099. The next prime is 21021120133127. The reversal of 21021120133101 is 10133102112012.

21021120133101 is a `hidden beast` number, since 210 + 2 + 1 + 120 + 1 + 331 + 0 + 1 = 666.

It is not a de Polignac number, because 21021120133101 - 2¹ = 21021120133099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021120133201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16288536 + ... + 17531646.

It is an arithmetic number, because the mean of its divisors is an integer number (1380183744680).

Almost surely, 2^{21021120133101} is an apocalyptic number.

It is an amenable number.

21021120133101 is a deficient number, since it is larger than the sum of its proper divisors (12103289739219).

21021120133101 is a wasteful number, since it uses less digits than its factorization.

21021120133101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413937 (or 1413934 counting only the distinct ones).

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

Adding to 21021120133101 its reverse (10133102112012), we get a palindrome (31154222245113).

The spelling of 21021120133101 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, one hundred thirty-three thousand, one hundred one".