2021122220221 has 8 divisors (see below), whose sum is σ = 2176661569824. Its totient is φ = 1865592643440.

The previous prime is 2021122220207. The next prime is 2021122220231. The reversal of 2021122220221 is 1220222211202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021122220221 - 2²⁷ = 2020988002493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021122220231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2010835 + ... + 2843536.

It is an arithmetic number, because the mean of its divisors is an integer number (272082696228).

Almost surely, 2^{2021122220221} is an apocalyptic number.

It is an amenable number.

2021122220221 is a deficient number, since it is larger than the sum of its proper divisors (155539349603).

2021122220221 is a wasteful number, since it uses less digits than its factorization.

2021122220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886411.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2021122220221 its reverse (1220222211202), we get a palindrome (3241344431423).

The spelling of 2021122220221 in words is "two trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".