1221003044 has 12 divisors (see below), whose sum is σ = 2138776668. Its totient is φ = 609924000.

The previous prime is 1221003041. The next prime is 1221003059. The reversal of 1221003044 is 4403001221.

It can be written as a sum of positive squares in 2 ways, for example, as 930982144 + 290020900 = 30512^2 + 17030^2 .

It is not an unprimeable number, because it can be changed into a prime (1221003041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139607 + ... + 148094.

It is an arithmetic number, because the mean of its divisors is an integer number (178231389).

Almost surely, 2^1221003044 is an apocalyptic number.

It is an amenable number.

1221003044 is a deficient number, since it is larger than the sum of its proper divisors (917773624).

1221003044 is a wasteful number, since it uses less digits than its factorization.

1221003044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288766 (or 288764 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1221003044 is about 34942.8539761709. The cubic root of 1221003044 is about 1068.8224866354.

Adding to 1221003044 its reverse (4403001221), we get a palindrome (5624004265).

The spelling of 1221003044 in words is "one billion, two hundred twenty-one million, three thousand, forty-four".