1353644308021 has 2 divisors, whose sum is σ = 1353644308022. Its totient is φ = 1353644308020.

The previous prime is 1353644308007. The next prime is 1353644308031. The reversal of 1353644308021 is 1208034463531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1320865205521 + 32779102500 = 1149289^2 + 181050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353644308021 - 2⁷ = 1353644307893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1353644308031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676822154010 + 676822154011.

It is an arithmetic number, because the mean of its divisors is an integer number (676822154011).

Almost surely, 2^{1353644308021} is an apocalyptic number.

It is an amenable number.

1353644308021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353644308021 is an equidigital number, since it uses as much as digits as its factorization.

1353644308021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 1353644308021 in words is "one trillion, three hundred fifty-three billion, six hundred forty-four million, three hundred eight thousand, twenty-one".