1213231039 has 2 divisors, whose sum is σ = 1213231040. Its totient is φ = 1213231038.

The previous prime is 1213231009. The next prime is 1213231067. The reversal of 1213231039 is 9301323121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213231039 - 2⁹ = 1213230527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213231009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606615519 + 606615520.

It is an arithmetic number, because the mean of its divisors is an integer number (606615520).

Almost surely, 2^1213231039 is an apocalyptic number.

1213231039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213231039 is an equidigital number, since it uses as much as digits as its factorization.

1213231039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1213231039 is about 34831.4662194976. The cubic root of 1213231039 is about 1066.5498792818.

The spelling of 1213231039 in words is "one billion, two hundred thirteen million, two hundred thirty-one thousand, thirty-nine".