1213366657812 has 24 divisors (see below), whose sum is σ = 2850190140000. Its totient is φ = 401741085216.

The previous prime is 1213366657801. The next prime is 1213366657859. The reversal of 1213366657812 is 2187566633121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339306562 + ... + 339310137.

It is an arithmetic number, because the mean of its divisors is an integer number (118757922500).

Almost surely, 2^{1213366657812} is an apocalyptic number.

1213366657812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213366657812 is an abundant number, since it is smaller than the sum of its proper divisors (1636823482188).

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

1213366657812 is a wasteful number, since it uses less digits than its factorization.

1213366657812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678616855 (or 678616853 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The spelling of 1213366657812 in words is "one trillion, two hundred thirteen billion, three hundred sixty-six million, six hundred fifty-seven thousand, eight hundred twelve".