1220110309 has 4 divisors (see below), whose sum is σ = 1331029440. Its totient is φ = 1109191180.

The previous prime is 1220110291. The next prime is 1220110319. The reversal of 1220110309 is 9030110221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220110309 - 2⁷ = 1220110181 is a prime.

It is a super-2 number, since 2×1220110309² = 2977338332256150962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220110319) 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, 55459549 + ... + 55459570.

It is an arithmetic number, because the mean of its divisors is an integer number (332757360).

Almost surely, 2^1220110309 is an apocalyptic number.

It is an amenable number.

1220110309 is a deficient number, since it is larger than the sum of its proper divisors (110919131).

1220110309 is a wasteful number, since it uses less digits than its factorization.

1220110309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110919130.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1220110309 is about 34930.0774261953. The cubic root of 1220110309 is about 1068.5619336718.

The spelling of 1220110309 in words is "one billion, two hundred twenty million, one hundred ten thousand, three hundred nine".