1322220012521 has 2 divisors, whose sum is σ = 1322220012522. Its totient is φ = 1322220012520.

The previous prime is 1322220012499. The next prime is 1322220012557. The reversal of 1322220012521 is 1252100222231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060562186896 + 261657825625 = 1029836^2 + 511525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322220012521 - 2¹⁸ = 1322219750377 is a prime.

It is a super-2 number, since 2×1322220012521² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1322220012721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661110006260 + 661110006261.

It is an arithmetic number, because the mean of its divisors is an integer number (661110006261).

Almost surely, 2^{1322220012521} is an apocalyptic number.

It is an amenable number.

1322220012521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322220012521 is an equidigital number, since it uses as much as digits as its factorization.

1322220012521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 1322220012521 its reverse (1252100222231), we get a palindrome (2574320234752).

The spelling of 1322220012521 in words is "one trillion, three hundred twenty-two billion, two hundred twenty million, twelve thousand, five hundred twenty-one".