123231121131 has 8 divisors (see below), whose sum is σ = 164311710160. Its totient is φ = 82152306432.

The previous prime is 123231121099. The next prime is 123231121151. The reversal of 123231121131 is 131121132321.

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

It is not a de Polignac number, because 123231121131 - 2⁵ = 123231121099 is a prime.

It is a super-2 number, since 2×123231121131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123231121098 and 123231121107.

It is not an unprimeable number, because it can be changed into a prime (123231121151) 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, 272050 + ... + 566103.

It is an arithmetic number, because the mean of its divisors is an integer number (20538963770).

Almost surely, 2^123231121131 is an apocalyptic number.

123231121131 is a deficient number, since it is larger than the sum of its proper divisors (41080589029).

123231121131 is an equidigital number, since it uses as much as digits as its factorization.

123231121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887165.

The product of its digits is 216, while the sum is 21.

Adding to 123231121131 its reverse (131121132321), we get a palindrome (254352253452).

The spelling of 123231121131 in words is "one hundred twenty-three billion, two hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty-one".