11981223199 has 16 divisors (see below), whose sum is σ = 13212472320. Its totient is φ = 10774260000.

The previous prime is 11981223197. The next prime is 11981223239. The reversal of 11981223199 is 99132218911.

It is a cyclic number.

It is not a de Polignac number, because 11981223199 - 2¹ = 11981223197 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 (11981223193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381889 + ... + 412069.

It is an arithmetic number, because the mean of its divisors is an integer number (825779520).

Almost surely, 2^11981223199 is an apocalyptic number.

11981223199 is a deficient number, since it is larger than the sum of its proper divisors (1231249121).

11981223199 is a wasteful number, since it uses less digits than its factorization.

11981223199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30582.

The product of its digits is 69984, while the sum is 46.

The spelling of 11981223199 in words is "eleven billion, nine hundred eighty-one million, two hundred twenty-three thousand, one hundred ninety-nine".