1220045512 has 32 divisors (see below), whose sum is σ = 2667744000. Its totient is φ = 522875472.

The previous prime is 1220045507. The next prime is 1220045521. The reversal of 1220045512 is 2155400221.

It is a super-2 number, since 2×1220045512² = 2977022102702684288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219568 + ... + 225055.

It is an arithmetic number, because the mean of its divisors is an integer number (83367000).

Almost surely, 2^1220045512 is an apocalyptic number.

It is an amenable number.

1220045512 is an abundant number, since it is smaller than the sum of its proper divisors (1447698488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220045512 is an equidigital number, since it uses as much as digits as its factorization.

1220045512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444650 (or 444632 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1220045512 is about 34929.1498894548. The cubic root of 1220045512 is about 1068.5430171217.

Adding to 1220045512 its reverse (2155400221), we get a palindrome (3375445733).

The spelling of 1220045512 in words is "one billion, two hundred twenty million, forty-five thousand, five hundred twelve".