1222109999 has 8 divisors (see below), whose sum is σ = 1346412240. Its totient is φ = 1100008000.

The previous prime is 1222109989. The next prime is 1222110017. The reversal of 1222109999 is 9999012221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222109999 - 2⁴ = 1222109983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222109989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548894 + ... + 551115.

It is an arithmetic number, because the mean of its divisors is an integer number (168301530).

Almost surely, 2^1222109999 is an apocalyptic number.

1222109999 is a deficient number, since it is larger than the sum of its proper divisors (124302241).

1222109999 is a wasteful number, since it uses less digits than its factorization.

1222109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100121.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 1222109999 is about 34958.6898925003. The cubic root of 1222109999 is about 1069.1453853754.

The spelling of 1222109999 in words is "one billion, two hundred twenty-two million, one hundred nine thousand, nine hundred ninety-nine".