2120220221 has 16 divisors (see below), whose sum is σ = 2492375424. Its totient is φ = 1765822464.

The previous prime is 2120220191. The next prime is 2120220233. The reversal of 2120220221 is 1220220212.

It is a de Polignac number, because none of the positive numbers 2^k-2120220221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120220196 and 2120220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120220251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39845 + ... + 76341.

It is an arithmetic number, because the mean of its divisors is an integer number (155773464).

Almost surely, 2^2120220221 is an apocalyptic number.

It is an amenable number.

2120220221 is a deficient number, since it is larger than the sum of its proper divisors (372155203).

2120220221 is a wasteful number, since it uses less digits than its factorization.

2120220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36740.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2120220221 is about 46045.8491180258. The cubic root of 2120220221 is about 1284.6761377554.

Adding to 2120220221 its reverse (1220220212), we get a palindrome (3340440433).

Subtracting from 2120220221 its reverse (1220220212), we obtain a palindrome (900000009).

The spelling of 2120220221 in words is "two billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".