211120222221 has 6 divisors (see below), whose sum is σ = 304951432110. Its totient is φ = 140746814808.

The previous prime is 211120222213. The next prime is 211120222237. The reversal of 211120222221 is 122222021112.

It is a happy number.

211120222221 is a `hidden beast` number, since 211 + 12 + 0 + 222 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128974356900 + 82145865321 = 359130^2 + 286611^2 .

It is not a de Polignac number, because 211120222221 - 2³ = 211120222213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211120222194 and 211120222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120222241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11728901226 + ... + 11728901243.

It is an arithmetic number, because the mean of its divisors is an integer number (50825238685).

Almost surely, 2^211120222221 is an apocalyptic number.

It is an amenable number.

211120222221 is a deficient number, since it is larger than the sum of its proper divisors (93831209889).

211120222221 is a wasteful number, since it uses less digits than its factorization.

211120222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23457802475 (or 23457802472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211120222221 its reverse (122222021112), we get a palindrome (333342243333).

The spelling of 211120222221 in words is "two hundred eleven billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".