11936221187 has 4 divisors (see below), whose sum is σ = 13021332216. Its totient is φ = 10851110160.

The previous prime is 11936221181. The next prime is 11936221223. The reversal of 11936221187 is 78112263911.

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

It is not a de Polignac number, because 11936221187 - 2²⁶ = 11869112323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11936221181) 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, 542555498 + ... + 542555519.

It is an arithmetic number, because the mean of its divisors is an integer number (3255333054).

Almost surely, 2^11936221187 is an apocalyptic number.

11936221187 is a deficient number, since it is larger than the sum of its proper divisors (1085111029).

11936221187 is a wasteful number, since it uses less digits than its factorization.

11936221187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085111028.

The product of its digits is 36288, while the sum is 41.

The spelling of 11936221187 in words is "eleven billion, nine hundred thirty-six million, two hundred twenty-one thousand, one hundred eighty-seven".