1213043120 has 40 divisors (see below), whose sum is σ = 2824340064. Its totient is φ = 484526592.

The previous prime is 1213043017. The next prime is 1213043137. The reversal of 1213043120 is 213403121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1213043120² = 2942947221958668800, which contains 22 as substring.

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, 47732 + ... + 68588.

Almost surely, 2^1213043120 is an apocalyptic number.

1213043120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213043120 is an abundant number, since it is smaller than the sum of its proper divisors (1611296944).

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

1213043120 is a wasteful number, since it uses less digits than its factorization.

1213043120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21597 (or 21591 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1213043120 is about 34828.7685685268. The cubic root of 1213043120 is about 1066.4948099863.

Adding to 1213043120 its reverse (213403121), we get a palindrome (1426446241).

The spelling of 1213043120 in words is "one billion, two hundred thirteen million, forty-three thousand, one hundred twenty".