1326947110021 has 4 divisors (see below), whose sum is σ = 1429019964652. Its totient is φ = 1224874255392.

The previous prime is 1326947110003. The next prime is 1326947110051. The reversal of 1326947110021 is 1200117496231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 552775893121 + 774171216900 = 743489^2 + 879870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326947110021 - 2⁵ = 1326947109989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326947110051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51036427296 + ... + 51036427321.

It is an arithmetic number, because the mean of its divisors is an integer number (357254991163).

Almost surely, 2^{1326947110021} is an apocalyptic number.

It is an amenable number.

1326947110021 is a deficient number, since it is larger than the sum of its proper divisors (102072854631).

1326947110021 is a wasteful number, since it uses less digits than its factorization.

1326947110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102072854630.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 1326947110021 in words is "one trillion, three hundred twenty-six billion, nine hundred forty-seven million, one hundred ten thousand, twenty-one".