2021002022221 has 24 divisors (see below), whose sum is σ = 2537003898240. Its totient is φ = 1595750883552.

The previous prime is 2021002022219. The next prime is 2021002022227. The reversal of 2021002022221 is 1222202001202.

It is not a de Polignac number, because 2021002022221 - 2¹ = 2021002022219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021002022195 and 2021002022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021002022227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2947161 + ... + 3567598.

It is an arithmetic number, because the mean of its divisors is an integer number (105708495760).

Almost surely, 2^{2021002022221} is an apocalyptic number.

It is an amenable number.

2021002022221 is a deficient number, since it is larger than the sum of its proper divisors (516001876019).

2021002022221 is a wasteful number, since it uses less digits than its factorization.

2021002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515273 (or 6515266 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2021002022221 its reverse (1222202001202), we get a palindrome (3243204023423).

The spelling of 2021002022221 in words is "two trillion, twenty-one billion, two million, twenty-two thousand, two hundred twenty-one".