1213042044 has 24 divisors (see below), whose sum is σ = 2928033360. Its totient is φ = 390404224.

The previous prime is 1213042043. The next prime is 1213042049. The reversal of 1213042044 is 4402403121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213042044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213042043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742529 + ... + 1743224.

It is an arithmetic number, because the mean of its divisors is an integer number (122001390).

Almost surely, 2^1213042044 is an apocalyptic number.

It is an amenable number.

1213042044 is an abundant number, since it is smaller than the sum of its proper divisors (1714991316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213042044 is a wasteful number, since it uses less digits than its factorization.

1213042044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485789 (or 3485787 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1213042044 is about 34828.7531215230. The cubic root of 1213042044 is about 1066.4944946502.

Adding to 1213042044 its reverse (4402403121), we get a palindrome (5615445165).

The spelling of 1213042044 in words is "one billion, two hundred thirteen million, forty-two thousand, forty-four".