21201002110231 has 2 divisors, whose sum is σ = 21201002110232. Its totient is φ = 21201002110230.

The previous prime is 21201002110177. The next prime is 21201002110237. The reversal of 21201002110231 is 13201120010212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201002110231 - 2¹⁹ = 21201001585943 is a prime.

It is a super-2 number, since 2×21201002110231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201002110237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600501055115 + 10600501055116.

It is an arithmetic number, because the mean of its divisors is an integer number (10600501055116).

Almost surely, 2^{21201002110231} is an apocalyptic number.

21201002110231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201002110231 is an equidigital number, since it uses as much as digits as its factorization.

21201002110231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21201002110231 its reverse (13201120010212), we get a palindrome (34402122120443).

The spelling of 21201002110231 in words is "twenty-one trillion, two hundred one billion, two million, one hundred ten thousand, two hundred thirty-one".