22311220221 has 6 divisors (see below), whose sum is σ = 32227318110. Its totient is φ = 14874146808.

The previous prime is 22311220213. The next prime is 22311220237. The reversal of 22311220221 is 12202211322.

22311220221 is a `hidden beast` number, since 223 + 1 + 1 + 220 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16991122500 + 5320097721 = 130350^2 + 72939^2 .

It is not a de Polignac number, because 22311220221 - 2³ = 22311220213 is a prime.

It is a super-3 number, since 3×22311220221³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22311220194 and 22311220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22311220021) 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, 1239512226 + ... + 1239512243.

It is an arithmetic number, because the mean of its divisors is an integer number (5371219685).

Almost surely, 2^22311220221 is an apocalyptic number.

It is an amenable number.

22311220221 is a deficient number, since it is larger than the sum of its proper divisors (9916097889).

22311220221 is a wasteful number, since it uses less digits than its factorization.

22311220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479024475 (or 2479024472 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22311220221 its reverse (12202211322), we get a palindrome (34513431543).

The spelling of 22311220221 in words is "twenty-two billion, three hundred eleven million, two hundred twenty thousand, two hundred twenty-one".