21010322231 has 2 divisors, whose sum is σ = 21010322232. Its totient is φ = 21010322230.

The previous prime is 21010322191. The next prime is 21010322269. The reversal of 21010322231 is 13222301012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010322231 - 2¹⁴ = 21010305847 is a prime.

It is a super-2 number, since 2×21010322231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010321231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505161115 + 10505161116.

It is an arithmetic number, because the mean of its divisors is an integer number (10505161116).

Almost surely, 2^21010322231 is an apocalyptic number.

21010322231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010322231 is an equidigital number, since it uses as much as digits as its factorization.

21010322231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21010322231 its reverse (13222301012), we get a palindrome (34232623243).

The spelling of 21010322231 in words is "twenty-one billion, ten million, three hundred twenty-two thousand, two hundred thirty-one".