222213022121 has 2 divisors, whose sum is σ = 222213022122. Its totient is φ = 222213022120.

The previous prime is 222213022099. The next prime is 222213022139. The reversal of 222213022121 is 121220312222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206970403600 + 15242618521 = 454940^2 + 123461^2 .

It is a cyclic number.

It is not a de Polignac number, because 222213022121 - 2¹⁴ = 222213005737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222213022093 and 222213022102.

It is not a weakly prime, because it can be changed into another prime (222213022151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106511060 + 111106511061.

It is an arithmetic number, because the mean of its divisors is an integer number (111106511061).

Almost surely, 2^222213022121 is an apocalyptic number.

It is an amenable number.

222213022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222213022121 is an equidigital number, since it uses as much as digits as its factorization.

222213022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222213022121 its reverse (121220312222), we get a palindrome (343433334343).

The spelling of 222213022121 in words is "two hundred twenty-two billion, two hundred thirteen million, twenty-two thousand, one hundred twenty-one".