1213113320120 has 128 divisors (see below), whose sum is σ = 3097686412800. Its totient is φ = 423862626816.

The previous prime is 1213113320117. The next prime is 1213113320143. The reversal of 1213113320120 is 210233113121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1213113320092 and 1213113320101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8694347 + ... + 8832773.

It is an arithmetic number, because the mean of its divisors is an integer number (24200675100).

Almost surely, 2^{1213113320120} is an apocalyptic number.

1213113320120 is a gapful number since it is divisible by the number (10) 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 1213113320120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548843206400).

1213113320120 is an abundant number, since it is smaller than the sum of its proper divisors (1884573092680).

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

1213113320120 is a wasteful number, since it uses less digits than its factorization.

1213113320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139357 (or 139353 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213113320120 its reverse (210233113121), we get a palindrome (1423346433241).

The spelling of 1213113320120 in words is "one trillion, two hundred thirteen billion, one hundred thirteen million, three hundred twenty thousand, one hundred twenty".