2021220202221 has 192 divisors, whose sum is σ = 3640764381696. Its totient is φ = 1065056256000.

The previous prime is 2021220202213. The next prime is 2021220202231. The reversal of 2021220202221 is 1222020221202.

2021220202221 is a `hidden beast` number, since 2 + 0 + 21 + 220 + 202 + 221 = 666.

It is not a de Polignac number, because 2021220202221 - 2³ = 2021220202213 is a prime.

It is a super-2 number, since 2×2021220202221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021220202194 and 2021220202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021220202231) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 196210771 + ... + 196221071.

It is an arithmetic number, because the mean of its divisors is an integer number (18962314488).

Almost surely, 2^{2021220202221} is an apocalyptic number.

It is an amenable number.

2021220202221 is a deficient number, since it is larger than the sum of its proper divisors (1619544179475).

2021220202221 is a wasteful number, since it uses less digits than its factorization.

2021220202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532 (or 10529 counting only the distinct ones).

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

Adding to 2021220202221 its reverse (1222020221202), we get a palindrome (3243240423423).

The spelling of 2021220202221 in words is "two trillion, twenty-one billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".