21301020233121 has 32 divisors (see below), whose sum is σ = 30049075840000. Its totient is φ = 13384479797568.

The previous prime is 21301020233093. The next prime is 21301020233147. The reversal of 21301020233121 is 12133202010312.

It is not a de Polignac number, because 21301020233121 - 2⁵ = 21301020233089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301020233821) 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, 137274846 + ... + 137429928.

It is an arithmetic number, because the mean of its divisors is an integer number (939033620000).

Almost surely, 2^{21301020233121} is an apocalyptic number.

It is an amenable number.

21301020233121 is a deficient number, since it is larger than the sum of its proper divisors (8748055606879).

21301020233121 is a wasteful number, since it uses less digits than its factorization.

21301020233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167413.

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

Adding to 21301020233121 its reverse (12133202010312), we get a palindrome (33434222243433).

The spelling of 21301020233121 in words is "twenty-one trillion, three hundred one billion, twenty million, two hundred thirty-three thousand, one hundred twenty-one".