11223785161 has 2 divisors, whose sum is σ = 11223785162. Its totient is φ = 11223785160.

The previous prime is 11223785099. The next prime is 11223785179. The reversal of 11223785161 is 16158732211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5813300025 + 5410485136 = 76245^2 + 73556^2 .

It is a cyclic number.

It is not a de Polignac number, because 11223785161 - 2²⁵ = 11190230729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11223785161.

It is not a weakly prime, because it can be changed into another prime (11223785191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611892580 + 5611892581.

It is an arithmetic number, because the mean of its divisors is an integer number (5611892581).

Almost surely, 2^11223785161 is an apocalyptic number.

It is an amenable number.

11223785161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223785161 is an equidigital number, since it uses as much as digits as its factorization.

11223785161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The spelling of 11223785161 in words is "eleven billion, two hundred twenty-three million, seven hundred eighty-five thousand, one hundred sixty-one".