2120222112221 has 8 divisors (see below), whose sum is σ = 2142141686784. Its totient is φ = 2098415235280.

The previous prime is 2120222112149. The next prime is 2120222112233. The reversal of 2120222112221 is 1222112220212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120222112221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120222112193 and 2120222112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120222112121) 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, 28136585 + ... + 28211838.

It is an arithmetic number, because the mean of its divisors is an integer number (267767710848).

Almost surely, 2^{2120222112221} is an apocalyptic number.

It is an amenable number.

2120222112221 is a deficient number, since it is larger than the sum of its proper divisors (21919574563).

2120222112221 is a wasteful number, since it uses less digits than its factorization.

2120222112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56348811.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2120222112221 its reverse (1222112220212), we get a palindrome (3342334332433).

The spelling of 2120222112221 in words is "two trillion, one hundred twenty billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".