13071112081 has 4 divisors (see below), whose sum is σ = 13072442164. Its totient is φ = 13069782000.

The previous prime is 13071112079. The next prime is 13071112091. The reversal of 13071112081 is 18021117031.

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 12191693056 + 879419025 = 110416^2 + 29655^2 .

It is a cyclic number.

It is not a de Polignac number, because 13071112081 - 2¹ = 13071112079 is a prime.

It is a super-2 number, since 2×13071112081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13071112091) 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, 650190 + ... + 669991.

It is an arithmetic number, because the mean of its divisors is an integer number (3268110541).

Almost surely, 2^13071112081 is an apocalyptic number.

It is an amenable number.

13071112081 is a deficient number, since it is larger than the sum of its proper divisors (1330083).

13071112081 is an equidigital number, since it uses as much as digits as its factorization.

13071112081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330082.

The product of its (nonzero) digits is 336, while the sum is 25.

The spelling of 13071112081 in words is "thirteen billion, seventy-one million, one hundred twelve thousand, eighty-one".