13266132155221 has 32 divisors (see below), whose sum is σ = 15593297993856. Its totient is φ = 11152527360000.

The previous prime is 13266132155197. The next prime is 13266132155251. The reversal of 13266132155221 is 12255123166231.

It is a cyclic number.

It is not a de Polignac number, because 13266132155221 - 2¹⁷ = 13266132024149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13266132155251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206700 + ... + 5155093.

It is an arithmetic number, because the mean of its divisors is an integer number (487290562308).

Almost surely, 2^{13266132155221} is an apocalyptic number.

13266132155221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13266132155221 is a deficient number, since it is larger than the sum of its proper divisors (2327165838635).

13266132155221 is a wasteful number, since it uses less digits than its factorization.

13266132155221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362053.

The product of its digits is 129600, while the sum is 40.

The spelling of 13266132155221 in words is "thirteen trillion, two hundred sixty-six billion, one hundred thirty-two million, one hundred fifty-five thousand, two hundred twenty-one".