222210022221 has 32 divisors (see below), whose sum is σ = 359564067840. Its totient is φ = 134508956400.

The previous prime is 222210022193. The next prime is 222210022253. The reversal of 222210022221 is 122220012222.

It is not a de Polignac number, because 222210022221 - 2⁷ = 222210022093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222210022194 and 222210022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222210022421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210115 + ... + 698976.

It is an arithmetic number, because the mean of its divisors is an integer number (11236377120).

Almost surely, 2^222210022221 is an apocalyptic number.

It is an amenable number.

222210022221 is a deficient number, since it is larger than the sum of its proper divisors (137354045619).

222210022221 is a wasteful number, since it uses less digits than its factorization.

222210022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909934 (or 909928 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222210022221 its reverse (122220012222), we get a palindrome (344430034443).

Subtracting from 222210022221 its reverse (122220012222), we obtain a palindrome (99990009999).

It can be divided in two parts, 2222100 and 22221, that multiplied together give a square (49377284100 = 222210²).

The spelling of 222210022221 in words is "two hundred twenty-two billion, two hundred ten million, twenty-two thousand, two hundred twenty-one".