1213013244 has 24 divisors (see below), whose sum is σ = 2834047440. Its totient is φ = 403811584.

The previous prime is 1213013239. The next prime is 1213013281. The reversal of 1213013244 is 4423103121.

It is a super-2 number, since 2×1213013244² = 2942802260238807072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213013244.

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, 56109 + ... + 74660.

It is an arithmetic number, because the mean of its divisors is an integer number (118085310).

Almost surely, 2^1213013244 is an apocalyptic number.

It is an amenable number.

1213013244 is an abundant number, since it is smaller than the sum of its proper divisors (1621034196).

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

1213013244 is a wasteful number, since it uses less digits than its factorization.

1213013244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131549 (or 131547 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1213013244 is about 34828.3396675753. The cubic root of 1213013244 is about 1066.4860543590.

Adding to 1213013244 its reverse (4423103121), we get a palindrome (5636116365).

The spelling of 1213013244 in words is "one billion, two hundred thirteen million, thirteen thousand, two hundred forty-four".