1220221012 has 12 divisors (see below), whose sum is σ = 2136596896. Its totient is φ = 609764760.

The previous prime is 1220220973. The next prime is 1220221043. The reversal of 1220221012 is 2101220221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220220983 and 1220221001.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 78414 + ... + 92677.

Almost surely, 2^1220221012 is an apocalyptic number.

It is an amenable number.

1220221012 is a deficient number, since it is larger than the sum of its proper divisors (916375884).

1220221012 is a wasteful number, since it uses less digits than its factorization.

1220221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172878 (or 172876 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220221012 is about 34931.6620274501. The cubic root of 1220221012 is about 1068.5942502673.

Adding to 1220221012 its reverse (2101220221), we get a palindrome (3321441233).

The spelling of 1220221012 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, twelve".