2120222212221 has 8 divisors (see below), whose sum is σ = 2903367353824. Its totient is φ = 1375279272720.

The previous prime is 2120222212219. The next prime is 2120222212249. The reversal of 2120222212221 is 1222122220212.

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

It is not a de Polignac number, because 2120222212221 - 2¹ = 2120222212219 is a prime.

It is a super-3 number, since 3×2120222212221³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120222212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9550550395 + ... + 9550550616.

It is an arithmetic number, because the mean of its divisors is an integer number (362920919228).

Almost surely, 2^{2120222212221} is an apocalyptic number.

It is an amenable number.

2120222212221 is a deficient number, since it is larger than the sum of its proper divisors (783145141603).

2120222212221 is a wasteful number, since it uses less digits than its factorization.

2120222212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19101101051.

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

Adding to 2120222212221 its reverse (1222122220212), we get a palindrome (3342344432433).

The spelling of 2120222212221 in words is "two trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".