1234421231 has 2 divisors, whose sum is σ = 1234421232. Its totient is φ = 1234421230.

The previous prime is 1234421219. The next prime is 1234421239. The reversal of 1234421231 is 1321244321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1234421231 is a prime.

It is a super-2 number, since 2×1234421231² = 3047591551087110722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1234421197 and 1234421206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234421239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617210615 + 617210616.

It is an arithmetic number, because the mean of its divisors is an integer number (617210616).

Almost surely, 2^1234421231 is an apocalyptic number.

1234421231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234421231 is an equidigital number, since it uses as much as digits as its factorization.

1234421231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 1234421231 is about 35134.3312302938. The cubic root of 1234421231 is about 1072.7234986463.

Adding to 1234421231 its reverse (1321244321), we get a palindrome (2555665552).

The spelling of 1234421231 in words is "one billion, two hundred thirty-four million, four hundred twenty-one thousand, two hundred thirty-one".