2120110122221 has 24 divisors (see below), whose sum is σ = 2687696311104. Its totient is φ = 1636536320640.

The previous prime is 2120110122167. The next prime is 2120110122257. The reversal of 2120110122221 is 1222210110212.

It is not a de Polignac number, because 2120110122221 - 2²² = 2120105927917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120110122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120110121221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21806951 + ... + 21903956.

It is an arithmetic number, because the mean of its divisors is an integer number (111987346296).

Almost surely, 2^{2120110122221} is an apocalyptic number.

It is an amenable number.

2120110122221 is a deficient number, since it is larger than the sum of its proper divisors (567586188883).

2120110122221 is a wasteful number, since it uses less digits than its factorization.

2120110122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43710981 (or 43710968 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2120110122221 its reverse (1222210110212), we get a palindrome (3342320232433).

The spelling of 2120110122221 in words is "two trillion, one hundred twenty billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".