1321211113120 has 192 divisors, whose sum is σ = 3340940359680. Its totient is φ = 492547765248.

The previous prime is 1321211113091. The next prime is 1321211113153. The reversal of 1321211113120 is 213111121231.

It is a super-2 number, since 2×1321211113120² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66292597 + ... + 66312523.

It is an arithmetic number, because the mean of its divisors is an integer number (17400731040).

Almost surely, 2^{1321211113120} is an apocalyptic number.

1321211113120 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 1321211113120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670470179840).

1321211113120 is an abundant number, since it is smaller than the sum of its proper divisors (2019729246560).

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

1321211113120 is a wasteful number, since it uses less digits than its factorization.

1321211113120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20427 (or 20419 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1321211113120 its reverse (213111121231), we get a palindrome (1534322234351).

The spelling of 1321211113120 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, one hundred thirteen thousand, one hundred twenty".