212121112022243 has 2 divisors, whose sum is σ = 212121112022244. Its totient is φ = 212121112022242.

The previous prime is 212121112022203. The next prime is 212121112022279. The reversal of 212121112022243 is 342220211121212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212121112022243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (212121112022203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060556011121 + 106060556011122.

It is an arithmetic number, because the mean of its divisors is an integer number (106060556011122).

Almost surely, 2^{212121112022243} is an apocalyptic number.

212121112022243 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121112022243 is an equidigital number, since it uses as much as digits as its factorization.

212121112022243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 212121112022243 its reverse (342220211121212), we get a palindrome (554341323143455).

The spelling of 212121112022243 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, twenty-two thousand, two hundred forty-three".