12220220220021 has 48 divisors (see below), whose sum is σ = 19501998048000. Its totient is φ = 7311640302720.

The previous prime is 12220220220017. The next prime is 12220220220067. The reversal of 12220220220021 is 12002202202221.

12220220220021 is a `hidden beast` number, since 1 + 2 + 220 + 220 + 2 + 200 + 21 = 666.

It is not a de Polignac number, because 12220220220021 - 2² = 12220220220017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12220220219976 and 12220220220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220220220071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75227275 + ... + 75389543.

It is an arithmetic number, because the mean of its divisors is an integer number (406291626000).

Almost surely, 2^{12220220220021} is an apocalyptic number.

12220220220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220220220021 is a deficient number, since it is larger than the sum of its proper divisors (7281777827979).

12220220220021 is a wasteful number, since it uses less digits than its factorization.

12220220220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171994 (or 171991 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12220220220021 its reverse (12002202202221), we get a palindrome (24222422422242).

It can be divided in two parts, 122202202200 and 21, that added together give a palindrome (122202202221).

The spelling of 12220220220021 in words is "twelve trillion, two hundred twenty billion, two hundred twenty million, two hundred twenty thousand, twenty-one".