21301210202231 has 2 divisors, whose sum is σ = 21301210202232. Its totient is φ = 21301210202230.

The previous prime is 21301210202197. The next prime is 21301210202243. The reversal of 21301210202231 is 13220201210312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21301210202231 is a prime.

It is a super-2 number, since 2×21301210202231² (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 (21301210202131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650605101115 + 10650605101116.

It is an arithmetic number, because the mean of its divisors is an integer number (10650605101116).

Almost surely, 2^{21301210202231} is an apocalyptic number.

21301210202231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301210202231 is an equidigital number, since it uses as much as digits as its factorization.

21301210202231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21301210202231 its reverse (13220201210312), we get a palindrome (34521411412543).

The spelling of 21301210202231 in words is "twenty-one trillion, three hundred one billion, two hundred ten million, two hundred two thousand, two hundred thirty-one".