1232421131 has 4 divisors (see below), whose sum is σ = 1232580552. Its totient is φ = 1232261712.

The previous prime is 1232421119. The next prime is 1232421133. The reversal of 1232421131 is 1311242321.

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 1232421131 - 2⁶ = 1232421067 is a prime.

It is a super-2 number, since 2×1232421131² = 3037723688270638322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232421133) 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 3 ways as a sum of consecutive naturals, for example, 67490 + ... + 83783.

It is an arithmetic number, because the mean of its divisors is an integer number (308145138).

Almost surely, 2^1232421131 is an apocalyptic number.

1232421131 is a deficient number, since it is larger than the sum of its proper divisors (159421).

1232421131 is an equidigital number, since it uses as much as digits as its factorization.

1232421131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159420.

The product of its digits is 288, while the sum is 20.

The square root of 1232421131 is about 35105.8560784380. The cubic root of 1232421131 is about 1072.1438169691.

Adding to 1232421131 its reverse (1311242321), we get a palindrome (2543663452).

The spelling of 1232421131 in words is "one billion, two hundred thirty-two million, four hundred twenty-one thousand, one hundred thirty-one".