1222220099 has 4 divisors (see below), whose sum is σ = 1222586040. Its totient is φ = 1221854160.

The previous prime is 1222220081. The next prime is 1222220107. The reversal of 1222220099 is 9900222221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9900222221 = 17 ⋅582366013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222220099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222220009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177914 + ... + 184655.

It is an arithmetic number, because the mean of its divisors is an integer number (305646510).

Almost surely, 2^1222220099 is an apocalyptic number.

1222220099 is a deficient number, since it is larger than the sum of its proper divisors (365941).

1222220099 is an equidigital number, since it uses as much as digits as its factorization.

1222220099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365940.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1222220099 is about 34960.2645727975. The cubic root of 1222220099 is about 1069.1774908793.

The spelling of 1222220099 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, ninety-nine".