1212221044 has 24 divisors (see below), whose sum is σ = 2132766720. Its totient is φ = 602869344.

The previous prime is 1212221011. The next prime is 1212221053. The reversal of 1212221044 is 4401222121.

It is a congruent number.

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, 708462 + ... + 710170.

It is an arithmetic number, because the mean of its divisors is an integer number (88865280).

Almost surely, 2^1212221044 is an apocalyptic number.

It is an amenable number.

1212221044 is a deficient number, since it is larger than the sum of its proper divisors (920545676).

1212221044 is a wasteful number, since it uses less digits than its factorization.

1212221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1212221044 is about 34816.9648878244. The cubic root of 1212221044 is about 1066.2538353382.

Adding to 1212221044 its reverse (4401222121), we get a palindrome (5613443165).

The spelling of 1212221044 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, forty-four".