1220221412 has 6 divisors (see below), whose sum is σ = 2135387478. Its totient is φ = 610110704.

The previous prime is 1220221397. The next prime is 1220221433. The reversal of 1220221412 is 2141220221.

It can be written as a sum of positive squares in only one way, i.e., 778633216 + 441588196 = 27904^2 + 21014^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152527673 + ... + 152527680.

It is an arithmetic number, because the mean of its divisors is an integer number (355897913).

Almost surely, 2^1220221412 is an apocalyptic number.

It is an amenable number.

1220221412 is a deficient number, since it is larger than the sum of its proper divisors (915166066).

1220221412 is a wasteful number, since it uses less digits than its factorization.

1220221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305055357 (or 305055355 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1220221412 is about 34931.6677529144. The cubic root of 1220221412 is about 1068.5943670324.

Adding to 1220221412 its reverse (2141220221), we get a palindrome (3361441633).

The spelling of 1220221412 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, four hundred twelve".