1213120344 has 32 divisors (see below), whose sum is σ = 3137382000. Its totient is φ = 390429312.

The previous prime is 1213120333. The next prime is 1213120367. The reversal of 1213120344 is 4430213121.

1213120344 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1213120344.

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, 870799 + ... + 872190.

Almost surely, 2^1213120344 is an apocalyptic number.

It is an amenable number.

1213120344 is an abundant number, since it is smaller than the sum of its proper divisors (1924261656).

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

1213120344 is a wasteful number, since it uses less digits than its factorization.

1213120344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743027 (or 1743023 counting only the distinct ones).

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

The square root of 1213120344 is about 34829.8771746327. The cubic root of 1213120344 is about 1066.5174410168.

Adding to 1213120344 its reverse (4430213121), we get a palindrome (5643333465).

The spelling of 1213120344 in words is "one billion, two hundred thirteen million, one hundred twenty thousand, three hundred forty-four".