1323121279 has 2 divisors, whose sum is σ = 1323121280. Its totient is φ = 1323121278.

The previous prime is 1323121273. The next prime is 1323121321. The reversal of 1323121279 is 9721213231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323121279 - 2²⁵ = 1289566847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323121279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323121273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661560639 + 661560640.

It is an arithmetic number, because the mean of its divisors is an integer number (661560640).

Almost surely, 2^1323121279 is an apocalyptic number.

1323121279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323121279 is an equidigital number, since it uses as much as digits as its factorization.

1323121279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 1323121279 is about 36374.7340746293. The cubic root of 1323121279 is about 1097.8252567240.

The spelling of 1323121279 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred seventy-nine".