1232221451 has 2 divisors, whose sum is σ = 1232221452. Its totient is φ = 1232221450.

The previous prime is 1232221379. The next prime is 1232221453. The reversal of 1232221451 is 1541222321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232221451 is a prime.

Together with 1232221453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1232221453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616110725 + 616110726.

It is an arithmetic number, because the mean of its divisors is an integer number (616110726).

Almost surely, 2^1232221451 is an apocalyptic number.

1232221451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232221451 is an equidigital number, since it uses as much as digits as its factorization.

1232221451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 1232221451 is about 35103.0119932749. The cubic root of 1232221451 is about 1072.0859100207.

Adding to 1232221451 its reverse (1541222321), we get a palindrome (2773443772).

The spelling of 1232221451 in words is "one billion, two hundred thirty-two million, two hundred twenty-one thousand, four hundred fifty-one".