1321422999 has 32 divisors (see below), whose sum is σ = 1922316480. Its totient is φ = 807371136.

The previous prime is 1321422983. The next prime is 1321423009. The reversal of 1321422999 is 9992241231.

It is not a de Polignac number, because 1321422999 - 2⁴ = 1321422983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321422999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321422299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1034149 + ... + 1035425.

It is an arithmetic number, because the mean of its divisors is an integer number (60072390).

Almost surely, 2^1321422999 is an apocalyptic number.

1321422999 is a deficient number, since it is larger than the sum of its proper divisors (600893481).

1321422999 is a wasteful number, since it uses less digits than its factorization.

1321422999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1450 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 1321422999 is about 36351.3823533576. The cubic root of 1321422999 is about 1097.3553544910.

The spelling of 1321422999 in words is "one billion, three hundred twenty-one million, four hundred twenty-two thousand, nine hundred ninety-nine".