222110110102021 has 2 divisors, whose sum is σ = 222110110102022. Its totient is φ = 222110110102020.

The previous prime is 222110110102019. The next prime is 222110110102073. The reversal of 222110110102021 is 120201011011222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169621606540996 + 52488503561025 = 13023886^2 + 7244895^2 .

It is a cyclic number.

It is not a de Polignac number, because 222110110102021 - 2¹ = 222110110102019 is a prime.

Together with 222110110102019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 222110110101986 and 222110110102004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222110110102091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111055055051010 + 111055055051011.

It is an arithmetic number, because the mean of its divisors is an integer number (111055055051011).

Almost surely, 2^{222110110102021} is an apocalyptic number.

It is an amenable number.

222110110102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222110110102021 is an equidigital number, since it uses as much as digits as its factorization.

222110110102021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 222110110102021 its reverse (120201011011222), we get a palindrome (342311121113243).

The spelling of 222110110102021 in words is "two hundred twenty-two trillion, one hundred ten billion, one hundred ten million, one hundred two thousand, twenty-one".