1220445311 has 8 divisors (see below), whose sum is σ = 1227736944. Its totient is φ = 1213168320.

The previous prime is 1220445301. The next prime is 1220445323. The reversal of 1220445311 is 1135440221.

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 1220445311 - 2¹⁰ = 1220444287 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 (1220445301) 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 7 ways as a sum of consecutive naturals, for example, 194621 + ... + 200793.

It is an arithmetic number, because the mean of its divisors is an integer number (153467118).

Almost surely, 2^1220445311 is an apocalyptic number.

1220445311 is a deficient number, since it is larger than the sum of its proper divisors (7291633).

1220445311 is an equidigital number, since it uses as much as digits as its factorization.

1220445311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7321.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1220445311 is about 34934.8724199760. The cubic root of 1220445311 is about 1068.6597219960.

Adding to 1220445311 its reverse (1135440221), we get a palindrome (2355885532).

The spelling of 1220445311 in words is "one billion, two hundred twenty million, four hundred forty-five thousand, three hundred eleven".