12135572327 has 4 divisors (see below), whose sum is σ = 12774286680. Its totient is φ = 11496857976.

The previous prime is 12135572303. The next prime is 12135572333. The reversal of 12135572327 is 72327553121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12135572327 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 (12135572347) 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, 319357148 + ... + 319357185.

It is an arithmetic number, because the mean of its divisors is an integer number (3193571670).

Almost surely, 2^12135572327 is an apocalyptic number.

12135572327 is a deficient number, since it is larger than the sum of its proper divisors (638714353).

12135572327 is an equidigital number, since it uses as much as digits as its factorization.

12135572327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638714352.

The product of its digits is 88200, while the sum is 38.

The spelling of 12135572327 in words is "twelve billion, one hundred thirty-five million, five hundred seventy-two thousand, three hundred twenty-seven".