1220011099 has 4 divisors (see below), whose sum is σ = 1222923240. Its totient is φ = 1217098960.

The previous prime is 1220011097. The next prime is 1220011123. The reversal of 1220011099 is 9901100221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220011099 - 2¹ = 1220011097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220011097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1455442 + ... + 1456279.

It is an arithmetic number, because the mean of its divisors is an integer number (305730810).

Almost surely, 2^1220011099 is an apocalyptic number.

1220011099 is a deficient number, since it is larger than the sum of its proper divisors (2912141).

1220011099 is an equidigital number, since it uses as much as digits as its factorization.

1220011099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912140.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1220011099 is about 34928.6572745074. The cubic root of 1220011099 is about 1068.5329704701.

The spelling of 1220011099 in words is "one billion, two hundred twenty million, eleven thousand, ninety-nine".