11311233187 has 2 divisors, whose sum is σ = 11311233188. Its totient is φ = 11311233186.

The previous prime is 11311233161. The next prime is 11311233209. The reversal of 11311233187 is 78133211311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11311233187 - 2¹⁵ = 11311200419 is a prime.

It is a super-4 number, since 4×11311233187⁴ (a number of 41 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (11311233137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655616593 + 5655616594.

It is an arithmetic number, because the mean of its divisors is an integer number (5655616594).

Almost surely, 2^11311233187 is an apocalyptic number.

11311233187 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311233187 is an equidigital number, since it uses as much as digits as its factorization.

11311233187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

Adding to 11311233187 its reverse (78133211311), we get a palindrome (89444444498).

The spelling of 11311233187 in words is "eleven billion, three hundred eleven million, two hundred thirty-three thousand, one hundred eighty-seven".