11861333331 has 4 divisors (see below), whose sum is σ = 15815111112. Its totient is φ = 7907555552.

The previous prime is 11861333327. The next prime is 11861333359. The reversal of 11861333331 is 13333316811.

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 11861333331 - 2² = 11861333327 is a prime.

It is a super-2 number, since 2×11861333331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11861333292 and 11861333301.

It is not an unprimeable number, because it can be changed into a prime (11861333371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1976888886 + ... + 1976888891.

It is an arithmetic number, because the mean of its divisors is an integer number (3953777778).

Almost surely, 2^11861333331 is an apocalyptic number.

11861333331 is a deficient number, since it is larger than the sum of its proper divisors (3953777781).

11861333331 is an equidigital number, since it uses as much as digits as its factorization.

11861333331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953777780.

The product of its digits is 11664, while the sum is 33.

The spelling of 11861333331 in words is "eleven billion, eight hundred sixty-one million, three hundred thirty-three thousand, three hundred thirty-one".