12697731071 has 4 divisors (see below), whose sum is σ = 12698003832. Its totient is φ = 12697458312.

The previous prime is 12697731031. The next prime is 12697731097. The reversal of 12697731071 is 17013779621.

It is a happy number.

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 12697731071 - 2²² = 12693536767 is a prime.

It is a super-2 number, since 2×12697731071² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697731031) 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, 47045 + ... + 166158.

It is an arithmetic number, because the mean of its divisors is an integer number (3174500958).

Almost surely, 2^12697731071 is an apocalyptic number.

12697731071 is a deficient number, since it is larger than the sum of its proper divisors (272761).

12697731071 is an equidigital number, since it uses as much as digits as its factorization.

12697731071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272760.

The product of its (nonzero) digits is 111132, while the sum is 44.

The spelling of 12697731071 in words is "twelve billion, six hundred ninety-seven million, seven hundred thirty-one thousand, seventy-one".