13021661267 has 16 divisors (see below), whose sum is σ = 14151321600. Its totient is φ = 11939931360.

The previous prime is 13021661249. The next prime is 13021661273. The reversal of 13021661267 is 76216612031.

It is not a de Polignac number, because 13021661267 - 2⁶ = 13021661203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13021663267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85784 + ... + 182762.

It is an arithmetic number, because the mean of its divisors is an integer number (884457600).

Almost surely, 2^13021661267 is an apocalyptic number.

13021661267 is a deficient number, since it is larger than the sum of its proper divisors (1129660333).

13021661267 is a wasteful number, since it uses less digits than its factorization.

13021661267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97226.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 13021661267 in words is "thirteen billion, twenty-one million, six hundred sixty-one thousand, two hundred sixty-seven".