1220555212 has 24 divisors (see below), whose sum is σ = 2253574400. Its totient is φ = 576824976.

The previous prime is 1220555207. The next prime is 1220555213. The reversal of 1220555212 is 2125550221.

It is not an unprimeable number, because it can be changed into a prime (1220555213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15073 + ... + 51655.

Almost surely, 2^1220555212 is an apocalyptic number.

It is an amenable number.

1220555212 is a deficient number, since it is larger than the sum of its proper divisors (1033019188).

1220555212 is a wasteful number, since it uses less digits than its factorization.

1220555212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37045 (or 37043 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1220555212 is about 34936.4453257626. The cubic root of 1220555212 is about 1068.6917986066.

The spelling of 1220555212 in words is "one billion, two hundred twenty million, five hundred fifty-five thousand, two hundred twelve".