2122021222221 has 8 divisors (see below), whose sum is σ = 2920631359744. Its totient is φ = 1369045949760.

The previous prime is 2122021222201. The next prime is 2122021222231. The reversal of 2122021222221 is 1222221202212.

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

It is not a de Polignac number, because 2122021222221 - 2²² = 2122017027917 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 (2122021222201) 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, 11408716156 + ... + 11408716341.

It is an arithmetic number, because the mean of its divisors is an integer number (365078919968).

Almost surely, 2^{2122021222221} is an apocalyptic number.

It is an amenable number.

2122021222221 is a deficient number, since it is larger than the sum of its proper divisors (798610137523).

2122021222221 is a wasteful number, since it uses less digits than its factorization.

2122021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22817432531.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2122021222221 its reverse (1222221202212), we get a palindrome (3344242424433).

The spelling of 2122021222221 in words is "two trillion, one hundred twenty-two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".