1213512412 has 12 divisors (see below), whose sum is σ = 2427024880. Its totient is φ = 520076736.

The previous prime is 1213512379. The next prime is 1213512427. The reversal of 1213512412 is 2142153121.

1213512412 is an admirable number.

It is a super-2 number, since 2×1213512412² = 2945224748156115488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21669837 + ... + 21669892.

Almost surely, 2^1213512412 is an apocalyptic number.

It is an amenable number.

1213512412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1213512412 is a wasteful number, since it uses less digits than its factorization.

1213512412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43339740 (or 43339738 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1213512412 is about 34835.5050487287. The cubic root of 1213512412 is about 1066.6323244586.

Adding to 1213512412 its reverse (2142153121), we get a palindrome (3355665533).

The spelling of 1213512412 in words is "one billion, two hundred thirteen million, five hundred twelve thousand, four hundred twelve".