212121222143 has 2 divisors, whose sum is σ = 212121222144. Its totient is φ = 212121222142.

The previous prime is 212121222107. The next prime is 212121222161. The reversal of 212121222143 is 341222121212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212121222143 - 2¹⁰ = 212121221119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212121222743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060611071 + 106060611072.

It is an arithmetic number, because the mean of its divisors is an integer number (106060611072).

Almost surely, 2^212121222143 is an apocalyptic number.

212121222143 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121222143 is an equidigital number, since it uses as much as digits as its factorization.

212121222143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

Adding to 212121222143 its reverse (341222121212), we get a palindrome (553343343355).

The spelling of 212121222143 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred forty-three".