1321123039 has 2 divisors, whose sum is σ = 1321123040. Its totient is φ = 1321123038.

The previous prime is 1321123003. The next prime is 1321123049. The reversal of 1321123039 is 9303211231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321123039 - 2⁹ = 1321122527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321123049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660561519 + 660561520.

It is an arithmetic number, because the mean of its divisors is an integer number (660561520).

Almost surely, 2^1321123039 is an apocalyptic number.

1321123039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321123039 is an equidigital number, since it uses as much as digits as its factorization.

1321123039 is an evil number, because the sum of its binary digits is even.

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

The square root of 1321123039 is about 36347.2562788445. The cubic root of 1321123039 is about 1097.2723158219.

The spelling of 1321123039 in words is "one billion, three hundred twenty-one million, one hundred twenty-three thousand, thirty-nine".