1220220012 has 48 divisors (see below), whose sum is σ = 3241066752. Its totient is φ = 353686080.

The previous prime is 1220219971. The next prime is 1220220019. The reversal of 1220220012 is 2100220221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1220220012.

It is not an unprimeable number, because it can be changed into a prime (1220220019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197923 + ... + 203994.

It is an arithmetic number, because the mean of its divisors is an integer number (67522224).

Almost surely, 2^1220220012 is an apocalyptic number.

1220220012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220220012 is an abundant number, since it is smaller than the sum of its proper divisors (2020846740).

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

1220220012 is a wasteful number, since it uses less digits than its factorization.

1220220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401958 (or 401956 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220220012 is about 34931.6477137853. The cubic root of 1220220012 is about 1068.5939583545.

Adding to 1220220012 its reverse (2100220221), we get a palindrome (3320440233).

The spelling of 1220220012 in words is "one billion, two hundred twenty million, two hundred twenty thousand, twelve".