1213658062812 has 216 divisors, whose sum is σ = 3607137555840. Its totient is φ = 341578218240.

The previous prime is 1213658062777. The next prime is 1213658062823. The reversal of 1213658062812 is 2182608563121.

1213658062812 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 6 + 5 + 8 + 0 + 628 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4775637 + ... + 5023347.

Almost surely, 2^{1213658062812} is an apocalyptic number.

1213658062812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213658062812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1803568777920).

1213658062812 is an abundant number, since it is smaller than the sum of its proper divisors (2393479493028).

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

1213658062812 is a wasteful number, since it uses less digits than its factorization.

1213658062812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247801 (or 247777 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 1213658062812 in words is "one trillion, two hundred thirteen billion, six hundred fifty-eight million, sixty-two thousand, eight hundred twelve".