11199623231 has 4 divisors (see below), whose sum is σ = 11280196200. Its totient is φ = 11119050264.

The previous prime is 11199623221. The next prime is 11199623287. The reversal of 11199623231 is 13232699111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11199623231 - 2⁶ = 11199623167 is a prime.

It is a super-2 number, since 2×11199623231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199623221) 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, 40286276 + ... + 40286553.

It is an arithmetic number, because the mean of its divisors is an integer number (2820049050).

Almost surely, 2^11199623231 is an apocalyptic number.

11199623231 is a deficient number, since it is larger than the sum of its proper divisors (80572969).

11199623231 is an equidigital number, since it uses as much as digits as its factorization.

11199623231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80572968.

The product of its digits is 17496, while the sum is 38.

The spelling of 11199623231 in words is "eleven billion, one hundred ninety-nine million, six hundred twenty-three thousand, two hundred thirty-one".