1213220044 has 6 divisors (see below), whose sum is σ = 2123135084. Its totient is φ = 606610020.

The previous prime is 1213220039. The next prime is 1213220083. The reversal of 1213220044 is 4400223121.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151652502 + ... + 151652509.

Almost surely, 2^1213220044 is an apocalyptic number.

It is an amenable number.

1213220044 is a deficient number, since it is larger than the sum of its proper divisors (909915040).

1213220044 is a wasteful number, since it uses less digits than its factorization.

1213220044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303305015 (or 303305013 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1213220044 is about 34831.3083877135. The cubic root of 1213220044 is about 1066.5466573752.

Adding to 1213220044 its reverse (4400223121), we get a palindrome (5613443165).

The spelling of 1213220044 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, forty-four".