121212210143 has 2 divisors, whose sum is σ = 121212210144. Its totient is φ = 121212210142.

The previous prime is 121212210103. The next prime is 121212210191. The reversal of 121212210143 is 341012212121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121212210143 - 2¹⁴ = 121212193759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212210103) 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, 60606105071 + 60606105072.

It is an arithmetic number, because the mean of its divisors is an integer number (60606105072).

Almost surely, 2^121212210143 is an apocalyptic number.

121212210143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212210143 is an equidigital number, since it uses as much as digits as its factorization.

121212210143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121212210143 its reverse (341012212121), we get a palindrome (462224422264).

The spelling of 121212210143 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, one hundred forty-three".