12192355561 has 3 divisors (see below), whose sum is σ = 12192465981. Its totient is φ = 12192245142.

The previous prime is 12192355547. The next prime is 12192355577. The reversal of 12192355561 is 16555329121.

The square root of 12192355561 is 110419.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 12192355561 - 2⁵ = 12192355529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12192355061) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55210 + ... + 165628.

It is an arithmetic number, because the mean of its divisors is an integer number (4064155327).

Almost surely, 2^12192355561 is an apocalyptic number.

12192355561 is the 110419-th square number.

12192355561 is the 55210-th centered octagonal number.

It is an amenable number.

12192355561 is a deficient number, since it is larger than the sum of its proper divisors (110420).

12192355561 is an frugal number, since it uses more digits than its factorization.

12192355561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220838 (or 110419 counting only the distinct ones).

The product of its digits is 81000, while the sum is 40.

The spelling of 12192355561 in words is "twelve billion, one hundred ninety-two million, three hundred fifty-five thousand, five hundred sixty-one".