1232123131 has 4 divisors (see below), whose sum is σ = 1246968072. Its totient is φ = 1217278192.

The previous prime is 1232123069. The next prime is 1232123143. The reversal of 1232123131 is 1313212321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313212321 = 827 ⋅1587923.

It is a cyclic number.

It is not a de Polignac number, because 1232123131 - 2¹⁹ = 1231598843 is a prime.

It is a super-2 number, since 2×1232123131² = 3036254819890486322, 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 = 1232123099 and 1232123108.

It is not an unprimeable number, because it can be changed into a prime (1232123231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7422346 + ... + 7422511.

It is an arithmetic number, because the mean of its divisors is an integer number (311742018).

Almost surely, 2^1232123131 is an apocalyptic number.

1232123131 is a deficient number, since it is larger than the sum of its proper divisors (14844941).

1232123131 is an equidigital number, since it uses as much as digits as its factorization.

1232123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14844940.

The product of its digits is 216, while the sum is 19.

The square root of 1232123131 is about 35101.6115157125. The cubic root of 1232123131 is about 1072.0573950460.

Adding to 1232123131 its reverse (1313212321), we get a palindrome (2545335452).

The spelling of 1232123131 in words is "one billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred thirty-one".