1232111131 has 8 divisors (see below), whose sum is σ = 1265562144. Its totient is φ = 1198822080.

The previous prime is 1232111129. The next prime is 1232111143. The reversal of 1232111131 is 1311112321.

It is a happy number.

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 1232111131 - 2¹ = 1232111129 is a prime.

It is a super-2 number, since 2×1232111131² = 3036195678268198322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1232111161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24991 + ... + 55576.

It is an arithmetic number, because the mean of its divisors is an integer number (158195268).

Almost surely, 2^1232111131 is an apocalyptic number.

1232111131 is a deficient number, since it is larger than the sum of its proper divisors (33451013).

1232111131 is an equidigital number, since it uses as much as digits as its factorization.

1232111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80981.

The product of its digits is 36, while the sum is 16.

The square root of 1232111131 is about 35101.4405829732. The cubic root of 1232111131 is about 1072.0539146767.

Adding to 1232111131 its reverse (1311112321), we get a palindrome (2543223452).

The spelling of 1232111131 in words is "one billion, two hundred thirty-two million, one hundred eleven thousand, one hundred thirty-one".