1213012312 has 8 divisors (see below), whose sum is σ = 2274398100. Its totient is φ = 606506152.

The previous prime is 1213012303. The next prime is 1213012363. The reversal of 1213012312 is 2132103121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75813262 + ... + 75813277.

Almost surely, 2^1213012312 is an apocalyptic number.

It is an amenable number.

1213012312 is a deficient number, since it is larger than the sum of its proper divisors (1061385788).

1213012312 is a wasteful number, since it uses less digits than its factorization.

1213012312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151626545 (or 151626541 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1213012312 is about 34828.3262876642. The cubic root of 1213012312 is about 1066.4857812195.

Adding to 1213012312 its reverse (2132103121), we get a palindrome (3345115433).

It can be divided in two parts, 12130 and 12312, that added together give a palindrome (24442).

The spelling of 1213012312 in words is "one billion, two hundred thirteen million, twelve thousand, three hundred twelve".