12021111113220 has 144 divisors (see below), whose sum is σ = 39825371634048. Its totient is φ = 2910807866880.

The previous prime is 12021111113147. The next prime is 12021111113251. The reversal of 12021111113220 is 2231111112021.

It is a happy number.

12021111113220 is a `hidden beast` number, since 1 + 20 + 211 + 1 + 111 + 322 + 0 = 666.

It is a super-2 number, since 2×12021111113220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12021111113193 and 12021111113202.

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, 1845304 + ... + 5239023.

It is an arithmetic number, because the mean of its divisors is an integer number (276565080792).

Almost surely, 2^{12021111113220} is an apocalyptic number.

12021111113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021111113220 is an abundant number, since it is smaller than the sum of its proper divisors (27804260520828).

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

12021111113220 is a wasteful number, since it uses less digits than its factorization.

12021111113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7085210 (or 7085205 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12021111113220 its reverse (2231111112021), we get a palindrome (14252222225241).

The spelling of 12021111113220 in words is "twelve trillion, twenty-one billion, one hundred eleven million, one hundred thirteen thousand, two hundred twenty".