1213056120 has 32 divisors (see below), whose sum is σ = 3639168720. Its totient is φ = 323481600.

The previous prime is 1213056073. The next prime is 1213056149. The reversal of 1213056120 is 216503121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5054281 + ... + 5054520.

Almost surely, 2^1213056120 is an apocalyptic number.

1213056120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213056120 is an abundant number, since it is smaller than the sum of its proper divisors (2426112600).

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

1213056120 is a wasteful number, since it uses less digits than its factorization.

1213056120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10108815 (or 10108811 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1213056120 is about 34828.9551953543. The cubic root of 1213056120 is about 1066.4986197940.

Adding to 1213056120 its reverse (216503121), we get a palindrome (1429559241).

The spelling of 1213056120 in words is "one billion, two hundred thirteen million, fifty-six thousand, one hundred twenty".