21301232220231 has 32 divisors (see below), whose sum is σ = 29367960437760. Its totient is φ = 13728051777024.

The previous prime is 21301232220197. The next prime is 21301232220239. The reversal of 21301232220231 is 13202223210312.

It is not a de Polignac number, because 21301232220231 - 2⁹ = 21301232219719 is a prime.

It is a super-2 number, since 2×21301232220231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301232220239) 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, 2123245 + ... + 6863718.

It is an arithmetic number, because the mean of its divisors is an integer number (917748763680).

Almost surely, 2^{21301232220231} is an apocalyptic number.

21301232220231 is a deficient number, since it is larger than the sum of its proper divisors (8066728217529).

21301232220231 is a wasteful number, since it uses less digits than its factorization.

21301232220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987255.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21301232220231 its reverse (13202223210312), we get a palindrome (34503455430543).

The spelling of 21301232220231 in words is "twenty-one trillion, three hundred one billion, two hundred thirty-two million, two hundred twenty thousand, two hundred thirty-one".