11999231 has 8 divisors (see below), whose sum is σ = 12337920. Its totient is φ = 11665368.

The previous prime is 11999179. The next prime is 11999233. The reversal of 11999231 is 13299911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11999231 - 2¹⁴ = 11982847 is a prime.

It is a super-2 number, since 2×11999231² = 287963089182722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11999191 and 11999200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4160 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (1542240).

Almost surely, 2^11999231 is an apocalyptic number.

11999231 is a deficient number, since it is larger than the sum of its proper divisors (338689).

11999231 is an equidigital number, since it uses as much as digits as its factorization.

11999231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413.

The product of its digits is 4374, while the sum is 35.

The square root of 11999231 is about 3463.9906177702. The cubic root of 11999231 is about 228.9379579326.

The spelling of 11999231 in words is "eleven million, nine hundred ninety-nine thousand, two hundred thirty-one".