222211022121 has 12 divisors (see below), whose sum is σ = 350150701680. Its totient is φ = 134673346680.

The previous prime is 222211022119. The next prime is 222211022129. The reversal of 222211022121 is 121220112222.

It is a happy number.

It is not a de Polignac number, because 222211022121 - 2¹ = 222211022119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222211022094 and 222211022103.

It is not an unprimeable number, because it can be changed into a prime (222211022129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1122277791 + ... + 1122277988.

It is an arithmetic number, because the mean of its divisors is an integer number (29179225140).

Almost surely, 2^222211022121 is an apocalyptic number.

It is an amenable number.

222211022121 is a deficient number, since it is larger than the sum of its proper divisors (127939679559).

222211022121 is a wasteful number, since it uses less digits than its factorization.

222211022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244555796 (or 2244555793 counting only the distinct ones).

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

Adding to 222211022121 its reverse (121220112222), we get a palindrome (343431134343).

The spelling of 222211022121 in words is "two hundred twenty-two billion, two hundred eleven million, twenty-two thousand, one hundred twenty-one".