212223341021 has 2 divisors, whose sum is σ = 212223341022. Its totient is φ = 212223341020.

The previous prime is 212223341017. The next prime is 212223341027. The reversal of 212223341021 is 120143322212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210933525625 + 1289815396 = 459275^2 + 35914^2 .

It is a cyclic number.

It is not a de Polignac number, because 212223341021 - 2² = 212223341017 is a prime.

It is a super-2 number, since 2×212223341021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212223341027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111670510 + 106111670511.

It is an arithmetic number, because the mean of its divisors is an integer number (106111670511).

Almost surely, 2^212223341021 is an apocalyptic number.

It is an amenable number.

212223341021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212223341021 is an equidigital number, since it uses as much as digits as its factorization.

212223341021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212223341021 its reverse (120143322212), we get a palindrome (332366663233).

The spelling of 212223341021 in words is "two hundred twelve billion, two hundred twenty-three million, three hundred forty-one thousand, twenty-one".