2021222222221 has 8 divisors (see below), whose sum is σ = 2179495080000. Its totient is φ = 1868138638560.

The previous prime is 2021222222189. The next prime is 2021222222267. The reversal of 2021222222221 is 1222222221202.

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

It is not a de Polignac number, because 2021222222221 - 2⁵ = 2021222222189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021222222192 and 2021222222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021222222291) 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, 1297317721 + ... + 1297319278.

It is an arithmetic number, because the mean of its divisors is an integer number (272436885000).

Almost surely, 2^{2021222222221} is an apocalyptic number.

It is an amenable number.

2021222222221 is a deficient number, since it is larger than the sum of its proper divisors (158272857779).

2021222222221 is a wasteful number, since it uses less digits than its factorization.

2021222222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594637059.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 2021222222221 its reverse (1222222221202), we get a palindrome (3243444443423).

It can be divided in two parts, 202 and 1222222221, that multiplied together give a palindrome (246888888642).

The spelling of 2021222222221 in words is "two trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".