1213055512 has 16 divisors (see below), whose sum is σ = 2373369840. Its totient is φ = 580156896.

The previous prime is 1213055509. The next prime is 1213055533. The reversal of 1213055512 is 2155503121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296163 + ... + 3296530.

It is an arithmetic number, because the mean of its divisors is an integer number (148335615).

Almost surely, 2^1213055512 is an apocalyptic number.

It is an amenable number.

1213055512 is a deficient number, since it is larger than the sum of its proper divisors (1160314328).

1213055512 is a wasteful number, since it uses less digits than its factorization.

1213055512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592722 (or 6592718 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1213055512 is about 34828.9464669835. The cubic root of 1213055512 is about 1066.4984416128.

Adding to 1213055512 its reverse (2155503121), we get a palindrome (3368558633).

The spelling of 1213055512 in words is "one billion, two hundred thirteen million, fifty-five thousand, five hundred twelve".