1232612321 has 2 divisors, whose sum is σ = 1232612322. Its totient is φ = 1232612320.

The previous prime is 1232612291. The next prime is 1232612323. The reversal of 1232612321 is 1232162321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951043921 + 281568400 = 30839^2 + 16780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232612321 - 2²⁶ = 1165503457 is a prime.

Together with 1232612323, 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 (1232612323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616306160 + 616306161.

It is an arithmetic number, because the mean of its divisors is an integer number (616306161).

Almost surely, 2^1232612321 is an apocalyptic number.

It is an amenable number.

1232612321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232612321 is an equidigital number, since it uses as much as digits as its factorization.

1232612321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 1232612321 is about 35108.5790227973. The cubic root of 1232612321 is about 1072.1992559670.

Adding to 1232612321 its reverse (1232162321), we get a palindrome (2464774642).

The spelling of 1232612321 in words is "one billion, two hundred thirty-two million, six hundred twelve thousand, three hundred twenty-one".