1352665031621 has 2 divisors, whose sum is σ = 1352665031622. Its totient is φ = 1352665031620.

The previous prime is 1352665031609. The next prime is 1352665031693. The reversal of 1352665031621 is 1261305662531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775694140225 + 576970891396 = 880735^2 + 759586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1352665031621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1352605031621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676332515810 + 676332515811.

It is an arithmetic number, because the mean of its divisors is an integer number (676332515811).

Almost surely, 2^{1352665031621} is an apocalyptic number.

It is an amenable number.

1352665031621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1352665031621 is an equidigital number, since it uses as much as digits as its factorization.

1352665031621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 1352665031621 in words is "one trillion, three hundred fifty-two billion, six hundred sixty-five million, thirty-one thousand, six hundred twenty-one".