21022132231 has 2 divisors, whose sum is σ = 21022132232. Its totient is φ = 21022132230.

The previous prime is 21022132193. The next prime is 21022132249. The reversal of 21022132231 is 13223122012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022132231 - 2¹¹ = 21022130183 is a prime.

It is a super-2 number, since 2×21022132231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21022132199 and 21022132208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022132031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511066115 + 10511066116.

It is an arithmetic number, because the mean of its divisors is an integer number (10511066116).

Almost surely, 2^21022132231 is an apocalyptic number.

21022132231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022132231 is an equidigital number, since it uses as much as digits as its factorization.

21022132231 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 19.

Adding to 21022132231 its reverse (13223122012), we get a palindrome (34245254243).

The spelling of 21022132231 in words is "twenty-one billion, twenty-two million, one hundred thirty-two thousand, two hundred thirty-one".