12132141985 has 4 divisors (see below), whose sum is σ = 14558570388. Its totient is φ = 9705713584.

The previous prime is 12132141949. The next prime is 12132142003. The reversal of 12132141985 is 58914123121.

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 3843132049 + 8289009936 = 61993^2 + 91044^2 .

It is a cyclic number.

It is not a de Polignac number, because 12132141985 - 2³¹ = 9984658337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213214194 + ... + 1213214203.

It is an arithmetic number, because the mean of its divisors is an integer number (3639642597).

Almost surely, 2^12132141985 is an apocalyptic number.

It is an amenable number.

12132141985 is a deficient number, since it is larger than the sum of its proper divisors (2426428403).

12132141985 is an equidigital number, since it uses as much as digits as its factorization.

12132141985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426428402.

The product of its digits is 17280, while the sum is 37.

It can be divided in two parts, 121321 and 41985, that added together give a triangular number (163306 = T₅₇₁).

The spelling of 12132141985 in words is "twelve billion, one hundred thirty-two million, one hundred forty-one thousand, nine hundred eighty-five".