222121010213 has 2 divisors, whose sum is σ = 222121010214. Its totient is φ = 222121010212.

The previous prime is 222121010207. The next prime is 222121010233. The reversal of 222121010213 is 312010121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216916542049 + 5204468164 = 465743^2 + 72142^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121010213 - 2⁶ = 222121010149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222121010191 and 222121010200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121010233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060505106 + 111060505107.

It is an arithmetic number, because the mean of its divisors is an integer number (111060505107).

Almost surely, 2^222121010213 is an apocalyptic number.

It is an amenable number.

222121010213 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121010213 is an equidigital number, since it uses as much as digits as its factorization.

222121010213 is an evil number, because the sum of its binary digits is even.

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

Adding to 222121010213 its reverse (312010121222), we get a palindrome (534131131435).

The spelling of 222121010213 in words is "two hundred twenty-two billion, one hundred twenty-one million, ten thousand, two hundred thirteen".