1213320120012 has 576 divisors, whose sum is σ = 4375205452800. Its totient is φ = 273274767360.

The previous prime is 1213320120007. The next prime is 1213320120013. The reversal of 1213320120012 is 2100210233121.

1213320120012 is a `hidden beast` number, since 1 + 213 + 320 + 120 + 0 + 12 = 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 (1213320120013) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 38650939 + ... + 38682317.

It is an arithmetic number, because the mean of its divisors is an integer number (7595842800).

Almost surely, 2^{1213320120012} is an apocalyptic number.

1213320120012 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 1213320120012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2187602726400).

1213320120012 is an abundant number, since it is smaller than the sum of its proper divisors (3161885332788).

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

1213320120012 is a wasteful number, since it uses less digits than its factorization.

1213320120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31486 (or 31481 counting only the distinct ones).

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

Adding to 1213320120012 its reverse (2100210233121), we get a palindrome (3313530353133).

The spelling of 1213320120012 in words is "one trillion, two hundred thirteen billion, three hundred twenty million, one hundred twenty thousand, twelve".