1322221999 has 16 divisors (see below), whose sum is σ = 1586285568. Its totient is φ = 1077544512.

The previous prime is 1322221991. The next prime is 1322222017. The reversal of 1322221999 is 9991222231.

It is a cyclic number.

It is not a de Polignac number, because 1322221999 - 2³ = 1322221991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322221991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2299 + ... + 51475.

It is an arithmetic number, because the mean of its divisors is an integer number (99142848).

Almost surely, 2^1322221999 is an apocalyptic number.

1322221999 is a deficient number, since it is larger than the sum of its proper divisors (264063569).

1322221999 is a wasteful number, since it uses less digits than its factorization.

1322221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49374.

The product of its digits is 34992, while the sum is 40.

The square root of 1322221999 is about 36362.3706460401. The cubic root of 1322221999 is about 1097.5764823387.

The spelling of 1322221999 in words is "one billion, three hundred twenty-two million, two hundred twenty-one thousand, nine hundred ninety-nine".