1213285912 has 32 divisors (see below), whose sum is σ = 2324044800. Its totient is φ = 593635104.

The previous prime is 1213285901. The next prime is 1213285919. The reversal of 1213285912 is 2195823121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213285919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99493 + ... + 111019.

It is an arithmetic number, because the mean of its divisors is an integer number (72626400).

Almost surely, 2^1213285912 is an apocalyptic number.

It is an amenable number.

1213285912 is a deficient number, since it is larger than the sum of its proper divisors (1110758888).

1213285912 is a wasteful number, since it uses less digits than its factorization.

1213285912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11815 (or 11811 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 1213285912 is about 34832.2539035303. The cubic root of 1213285912 is about 1066.5659586344.

The spelling of 1213285912 in words is "one billion, two hundred thirteen million, two hundred eighty-five thousand, nine hundred twelve".