212120012122901 has 2 divisors, whose sum is σ = 212120012122902. Its totient is φ = 212120012122900.

The previous prime is 212120012122873. The next prime is 212120012122933. The reversal of 212120012122901 is 109221210021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118942035663025 + 93177976459876 = 10906055^2 + 9652874^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120012122901 - 2¹⁰ = 212120012121877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120012127901) 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, 106060006061450 + 106060006061451.

It is an arithmetic number, because the mean of its divisors is an integer number (106060006061451).

Almost surely, 2^{212120012122901} is an apocalyptic number.

It is an amenable number.

212120012122901 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120012122901 is an equidigital number, since it uses as much as digits as its factorization.

212120012122901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 212120012122901 in words is "two hundred twelve trillion, one hundred twenty billion, twelve million, one hundred twenty-two thousand, nine hundred one".