1213041312 has 96 divisors (see below), whose sum is σ = 4043491200. Its totient is φ = 346581504.

The previous prime is 1213041289. The next prime is 1213041317. The reversal of 1213041312 is 2131403121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1213041317) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 94237 + ... + 106332.

It is an arithmetic number, because the mean of its divisors is an integer number (42119700).

Almost surely, 2^1213041312 is an apocalyptic number.

1213041312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213041312 is an abundant number, since it is smaller than the sum of its proper divisors (2830449888).

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

1213041312 is a wasteful number, since it uses less digits than its factorization.

1213041312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200595 (or 200581 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1213041312 is about 34828.7426129626. The cubic root of 1213041312 is about 1066.4942801278.

Adding to 1213041312 its reverse (2131403121), we get a palindrome (3344444433).

The spelling of 1213041312 in words is "one billion, two hundred thirteen million, forty-one thousand, three hundred twelve".