11231811889 has 12 divisors (see below), whose sum is σ = 11943067500. Its totient is φ = 10560754688.

The previous prime is 11231811883. The next prime is 11231811893. The reversal of 11231811889 is 98811813211.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1223810289 + 10008001600 = 34983^2 + 100040^2 .

It is not a de Polignac number, because 11231811889 - 2⁷ = 11231811761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11231811883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284637 + ... + 321685.

It is an arithmetic number, because the mean of its divisors is an integer number (995255625).

Almost surely, 2^11231811889 is an apocalyptic number.

It is an amenable number.

11231811889 is a deficient number, since it is larger than the sum of its proper divisors (711255611).

11231811889 is a wasteful number, since it uses less digits than its factorization.

11231811889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38132 (or 38115 counting only the distinct ones).

The product of its digits is 27648, while the sum is 43.

The spelling of 11231811889 in words is "eleven billion, two hundred thirty-one million, eight hundred eleven thousand, eight hundred eighty-nine".