1232121239 has 2 divisors, whose sum is σ = 1232121240. Its totient is φ = 1232121238.

The previous prime is 1232121227. The next prime is 1232121259. The reversal of 1232121239 is 9321212321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232121239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232121259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616060619 + 616060620.

It is an arithmetic number, because the mean of its divisors is an integer number (616060620).

Almost surely, 2^1232121239 is an apocalyptic number.

1232121239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232121239 is an equidigital number, since it uses as much as digits as its factorization.

1232121239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1232121239 is about 35101.5845653725. The cubic root of 1232121239 is about 1072.0568463093.

The spelling of 1232121239 in words is "one billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred thirty-nine".