11801257199 has 4 divisors (see below), whose sum is σ = 11801474664. Its totient is φ = 11801039736.

The previous prime is 11801257157. The next prime is 11801257229. The reversal of 11801257199 is 99175210811.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11801257199 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 (11801277199) 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, 47429 + ... + 160785.

It is an arithmetic number, because the mean of its divisors is an integer number (2950368666).

Almost surely, 2^11801257199 is an apocalyptic number.

11801257199 is a deficient number, since it is larger than the sum of its proper divisors (217465).

11801257199 is a wasteful number, since it uses less digits than its factorization.

11801257199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217464.

The product of its (nonzero) digits is 45360, while the sum is 44.

The spelling of 11801257199 in words is "eleven billion, eight hundred one million, two hundred fifty-seven thousand, one hundred ninety-nine".