1220000012 has 24 divisors (see below), whose sum is σ = 2661818880. Its totient is φ = 475324560.

The previous prime is 1219999993. The next prime is 1220000027. The reversal of 1220000012 is 2100000221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980212 + ... + 1980827.

It is an arithmetic number, because the mean of its divisors is an integer number (110909120).

Almost surely, 2^1220000012 is an apocalyptic number.

It is an amenable number.

1220000012 is an abundant number, since it is smaller than the sum of its proper divisors (1441818868).

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

1220000012 is a wasteful number, since it uses less digits than its factorization.

1220000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961061 (or 3961059 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1220000012 is about 34928.4985649255. The cubic root of 1220000012 is about 1068.5297336523.

Adding to 1220000012 its reverse (2100000221), we get a palindrome (3320000233).

The spelling of 1220000012 in words is "one billion, two hundred twenty million, twelve", and thus it is an aban number.