12188244461 has 4 divisors (see below), whose sum is σ = 12189301692. Its totient is φ = 12187187232.

The previous prime is 12188244457. The next prime is 12188244517. The reversal of 12188244461 is 16444288121.

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 11094619561 + 1093624900 = 105331^2 + 33070^2 .

It is a cyclic number.

It is not a de Polignac number, because 12188244461 - 2² = 12188244457 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 (12188244661) 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, 511130 + ... + 534443.

It is an arithmetic number, because the mean of its divisors is an integer number (3047325423).

Almost surely, 2^12188244461 is an apocalyptic number.

It is an amenable number.

12188244461 is a deficient number, since it is larger than the sum of its proper divisors (1057231).

12188244461 is a wasteful number, since it uses less digits than its factorization.

12188244461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057230.

The product of its digits is 98304, while the sum is 41.

The spelling of 12188244461 in words is "twelve billion, one hundred eighty-eight million, two hundred forty-four thousand, four hundred sixty-one".