212000102100121 has 2 divisors, whose sum is σ = 212000102100122. Its totient is φ = 212000102100120.

The previous prime is 212000102100119. The next prime is 212000102100181. The reversal of 212000102100121 is 121001201000212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178067380067721 + 33932722032400 = 13344189^2 + 5825180^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000102100121 - 2¹ = 212000102100119 is a prime.

Together with 212000102100119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212000102100181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000051050060 + 106000051050061.

It is an arithmetic number, because the mean of its divisors is an integer number (106000051050061).

Almost surely, 2^{212000102100121} is an apocalyptic number.

It is an amenable number.

212000102100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212000102100121 is an equidigital number, since it uses as much as digits as its factorization.

212000102100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212000102100121 its reverse (121001201000212), we get a palindrome (333001303100333).

The spelling of 212000102100121 in words is "two hundred twelve trillion, one hundred two million, one hundred thousand, one hundred twenty-one".