13052105621 has 2 divisors, whose sum is σ = 13052105622. Its totient is φ = 13052105620.

The previous prime is 13052105617. The next prime is 13052105639. The reversal of 13052105621 is 12650125031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8970173521 + 4081932100 = 94711^2 + 63890^2 .

It is a cyclic number.

It is not a de Polignac number, because 13052105621 - 2² = 13052105617 is a prime.

It is a super-2 number, since 2×13052105621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13052102621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6526052810 + 6526052811.

It is an arithmetic number, because the mean of its divisors is an integer number (6526052811).

Almost surely, 2^13052105621 is an apocalyptic number.

It is an amenable number.

13052105621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13052105621 is an equidigital number, since it uses as much as digits as its factorization.

13052105621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 13052105621 in words is "thirteen billion, fifty-two million, one hundred five thousand, six hundred twenty-one".