222123011021 has 2 divisors, whose sum is σ = 222123011022. Its totient is φ = 222123011020.

The previous prime is 222123010951. The next prime is 222123011081. The reversal of 222123011021 is 120110321222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131123652100 + 90999358921 = 362110^2 + 301661^2 .

It is a cyclic number.

It is not a de Polignac number, because 222123011021 - 2¹⁸ = 222122748877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222123011081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061505510 + 111061505511.

It is an arithmetic number, because the mean of its divisors is an integer number (111061505511).

Almost surely, 2^222123011021 is an apocalyptic number.

It is an amenable number.

222123011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222123011021 is an equidigital number, since it uses as much as digits as its factorization.

222123011021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 222123011021 its reverse (120110321222), we get a palindrome (342233332243).

The spelling of 222123011021 in words is "two hundred twenty-two billion, one hundred twenty-three million, eleven thousand, twenty-one".