12021311120 has 240 divisors, whose sum is σ = 35159624640. Its totient is φ = 3788725248.

The previous prime is 12021311117. The next prime is 12021311143. The reversal of 12021311120 is 2111312021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 12021311095 and 12021311104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21351959 + ... + 21352521.

It is an arithmetic number, because the mean of its divisors is an integer number (146498436).

Almost surely, 2^12021311120 is an apocalyptic number.

12021311120 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 12021311120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17579812320).

12021311120 is an abundant number, since it is smaller than the sum of its proper divisors (23138313520).

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

12021311120 is a wasteful number, since it uses less digits than its factorization.

12021311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12021311120 its reverse (2111312021), we get a palindrome (14132623141).

Subtracting from 12021311120 its reverse (2111312021), we obtain a palindrome (9909999099).

The spelling of 12021311120 in words is "twelve billion, twenty-one million, three hundred eleven thousand, one hundred twenty".