2122220212221 has 32 divisors (see below), whose sum is σ = 2910127620096. Its totient is φ = 1374670440000.

The previous prime is 2122220212219. The next prime is 2122220212291. The reversal of 2122220212221 is 1222120222212.

It is not a de Polignac number, because 2122220212221 - 2¹ = 2122220212219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122220212201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379575136 + ... + 379580726.

It is an arithmetic number, because the mean of its divisors is an integer number (90941488128).

Almost surely, 2^{2122220212221} is an apocalyptic number.

It is an amenable number.

2122220212221 is a deficient number, since it is larger than the sum of its proper divisors (787907407875).

2122220212221 is a wasteful number, since it uses less digits than its factorization.

2122220212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9753.

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

Adding to 2122220212221 its reverse (1222120222212), we get a palindrome (3344340434433).

Subtracting from 2122220212221 its reverse (1222120222212), we obtain a palindrome (900099990009).

The spelling of 2122220212221 in words is "two trillion, one hundred twenty-two billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-one".