13261621271 has 4 divisors (see below), whose sum is σ = 13570031112. Its totient is φ = 12953211432.

The previous prime is 13261621237. The next prime is 13261621319. The reversal of 13261621271 is 17212616231.

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

It is a cyclic number.

It is not a de Polignac number, because 13261621271 - 2³⁰ = 12187879447 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 (13261621211) 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, 154204856 + ... + 154204941.

It is an arithmetic number, because the mean of its divisors is an integer number (3392507778).

Almost surely, 2^13261621271 is an apocalyptic number.

13261621271 is a deficient number, since it is larger than the sum of its proper divisors (308409841).

13261621271 is an equidigital number, since it uses as much as digits as its factorization.

13261621271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308409840.

The product of its digits is 6048, while the sum is 32.

The spelling of 13261621271 in words is "thirteen billion, two hundred sixty-one million, six hundred twenty-one thousand, two hundred seventy-one".