21322121113231 has 2 divisors, whose sum is σ = 21322121113232. Its totient is φ = 21322121113230.

The previous prime is 21322121113211. The next prime is 21322121113247. The reversal of 21322121113231 is 13231112122312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21322121113231 - 2⁷ = 21322121113103 is a prime.

It is a super-2 number, since 2×21322121113231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21322121113196 and 21322121113205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322121113201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661060556615 + 10661060556616.

It is an arithmetic number, because the mean of its divisors is an integer number (10661060556616).

Almost surely, 2^{21322121113231} is an apocalyptic number.

21322121113231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322121113231 is an equidigital number, since it uses as much as digits as its factorization.

21322121113231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

Adding to 21322121113231 its reverse (13231112122312), we get a palindrome (34553233235543).

The spelling of 21322121113231 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred thirty-one".