1322553520021 has 2 divisors, whose sum is σ = 1322553520022. Its totient is φ = 1322553520020.

The previous prime is 1322553520009. The next prime is 1322553520049. The reversal of 1322553520021 is 1200253552231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1305934700625 + 16618819396 = 1142775^2 + 128914^2 .

It is an emirp because it is prime and its reverse (1200253552231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1322553520021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322553520081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661276760010 + 661276760011.

It is an arithmetic number, because the mean of its divisors is an integer number (661276760011).

Almost surely, 2^{1322553520021} is an apocalyptic number.

It is an amenable number.

1322553520021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322553520021 is an equidigital number, since it uses as much as digits as its factorization.

1322553520021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 1322553520021 in words is "one trillion, three hundred twenty-two billion, five hundred fifty-three million, five hundred twenty thousand, twenty-one".