1213210320012 has 48 divisors (see below), whose sum is σ = 3149616534400. Its totient is φ = 403856182800.

The previous prime is 1213210319987. The next prime is 1213210320017. The reversal of 1213210320012 is 2100230123121.

1213210320012 is a `hidden beast` number, since 1 + 21 + 321 + 0 + 320 + 0 + 1 + 2 = 666.

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 (1213210320017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7520614 + ... + 7680237.

Almost surely, 2^{1213210320012} is an apocalyptic number.

1213210320012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213210320012 is an abundant number, since it is smaller than the sum of its proper divisors (1936406214388).

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

1213210320012 is a wasteful number, since it uses less digits than its factorization.

1213210320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15201603 (or 15201595 counting only the distinct ones).

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

Adding to 1213210320012 its reverse (2100230123121), we get a palindrome (3313440443133).

The spelling of 1213210320012 in words is "one trillion, two hundred thirteen billion, two hundred ten million, three hundred twenty thousand, twelve".