212010100121 has 2 divisors, whose sum is σ = 212010100122. Its totient is φ = 212010100120.

The previous prime is 212010100117. The next prime is 212010100139. The reversal of 212010100121 is 121001010212.

212010100121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198015210121 + 13994890000 = 444989^2 + 118300^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010100121 - 2² = 212010100117 is a prime.

It is not a weakly prime, because it can be changed into another prime (212010100921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005050060 + 106005050061.

It is an arithmetic number, because the mean of its divisors is an integer number (106005050061).

Almost surely, 2^212010100121 is an apocalyptic number.

It is an amenable number.

212010100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212010100121 is an equidigital number, since it uses as much as digits as its factorization.

212010100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212010100121 its reverse (121001010212), we get a palindrome (333011110333).

The spelling of 212010100121 in words is "two hundred twelve billion, ten million, one hundred thousand, one hundred twenty-one".