1213323121120 has 96 divisors (see below), whose sum is σ = 3227937785856. Its totient is φ = 426975859200.

The previous prime is 1213323121079. The next prime is 1213323121259. The reversal of 1213323121120 is 211213233121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1213323121091 and 1213323121100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11064604 + ... + 11173723.

It is an arithmetic number, because the mean of its divisors is an integer number (33624351936).

Almost surely, 2^{1213323121120} is an apocalyptic number.

1213323121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213323121120 is an abundant number, since it is smaller than the sum of its proper divisors (2014614664736).

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

1213323121120 is a wasteful number, since it uses less digits than its factorization.

1213323121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22238384 (or 22238376 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1213323121120 its reverse (211213233121), we get a palindrome (1424536354241).

The spelling of 1213323121120 in words is "one trillion, two hundred thirteen billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred twenty".