12165561203 has 2 divisors, whose sum is σ = 12165561204. Its totient is φ = 12165561202.

The previous prime is 12165561151. The next prime is 12165561217. The reversal of 12165561203 is 30216556121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12165561203 - 2⁸ = 12165560947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12165561203.

It is not a weakly prime, because it can be changed into another prime (12165561253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082780601 + 6082780602.

It is an arithmetic number, because the mean of its divisors is an integer number (6082780602).

Almost surely, 2^12165561203 is an apocalyptic number.

12165561203 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165561203 is an equidigital number, since it uses as much as digits as its factorization.

12165561203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 12165561203 in words is "twelve billion, one hundred sixty-five million, five hundred sixty-one thousand, two hundred three".