12021000022220 has 48 divisors (see below), whose sum is σ = 29174561881920. Its totient is φ = 4075176889344.

The previous prime is 12021000022201. The next prime is 12021000022247. The reversal of 12021000022220 is 2222000012021.

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 = 12021000022195 and 12021000022204.

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, 482371169 + ... + 482396088.

It is an arithmetic number, because the mean of its divisors is an integer number (607803372540).

Almost surely, 2^{12021000022220} is an apocalyptic number.

12021000022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021000022220 is an abundant number, since it is smaller than the sum of its proper divisors (17153561859700).

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

12021000022220 is a wasteful number, since it uses less digits than its factorization.

12021000022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964767362 (or 964767360 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12021000022220 its reverse (2222000012021), we get a palindrome (14243000034241).

The spelling of 12021000022220 in words is "twelve trillion, twenty-one billion, twenty-two thousand, two hundred twenty".