1221502244 has 12 divisors (see below), whose sum is σ = 2137873584. Its totient is φ = 610681224.

The previous prime is 1221502237. The next prime is 1221502291. The reversal of 1221502244 is 4422051221.

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, 61127 + ... + 78609.

It is an arithmetic number, because the mean of its divisors is an integer number (178156132).

Almost surely, 2^1221502244 is an apocalyptic number.

It is an amenable number.

1221502244 is a deficient number, since it is larger than the sum of its proper divisors (916371340).

1221502244 is a wasteful number, since it uses less digits than its factorization.

1221502244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34954 (or 34952 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1221502244 is about 34949.9963376250. The cubic root of 1221502244 is about 1068.9681274102.

Adding to 1221502244 its reverse (4422051221), we get a palindrome (5643553465).

The spelling of 1221502244 in words is "one billion, two hundred twenty-one million, five hundred two thousand, two hundred forty-four".