1220123299 has 4 divisors (see below), whose sum is σ = 1224984600. Its totient is φ = 1215262000.

The previous prime is 1220123291. The next prime is 1220123309. The reversal of 1220123299 is 9923210221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9923210221 = 193 ⋅51415597.

It is a cyclic number.

It is not a de Polignac number, because 1220123299 - 2³ = 1220123291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220123299.

It is not an unprimeable number, because it can be changed into a prime (1220123291) 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, 2430274 + ... + 2430775.

It is an arithmetic number, because the mean of its divisors is an integer number (306246150).

Almost surely, 2^1220123299 is an apocalyptic number.

1220123299 is a deficient number, since it is larger than the sum of its proper divisors (4861301).

1220123299 is an equidigital number, since it uses as much as digits as its factorization.

1220123299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861300.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1220123299 is about 34930.2633686034. The cubic root of 1220123299 is about 1068.5657258344.

The spelling of 1220123299 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, two hundred ninety-nine".