1213321311120 has 80 divisors (see below), whose sum is σ = 3761944577280. Its totient is φ = 323496563712.

The previous prime is 1213321311101. The next prime is 1213321311133. The reversal of 1213321311120 is 211131233121.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 968452 + ... + 1834268.

It is an arithmetic number, because the mean of its divisors is an integer number (47024307216).

Almost surely, 2^{1213321311120} is an apocalyptic number.

1213321311120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213321311120 is an abundant number, since it is smaller than the sum of its proper divisors (2548623266160).

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

1213321311120 is a wasteful number, since it uses less digits than its factorization.

1213321311120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871672 (or 871666 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1213321311120 its reverse (211131233121), we get a palindrome (1424452544241).

The spelling of 1213321311120 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, three hundred eleven thousand, one hundred twenty".