101212102221221 has 2 divisors, whose sum is σ = 101212102221222. Its totient is φ = 101212102221220.

The previous prime is 101212102221199. The next prime is 101212102221239. The reversal of 101212102221221 is 122122201212101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74108510476900 + 27103591744321 = 8608630^2 + 5206111^2 .

It is an emirp because it is prime and its reverse (122122201212101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101212102221221 - 2⁶ = 101212102221157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101212102221193 and 101212102221202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101212102221271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606051110610 + 50606051110611.

It is an arithmetic number, because the mean of its divisors is an integer number (50606051110611).

Almost surely, 2^{101212102221221} is an apocalyptic number.

It is an amenable number.

101212102221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212102221221 is an equidigital number, since it uses as much as digits as its factorization.

101212102221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 101212102221221 its reverse (122122201212101), we get a palindrome (223334303433322).

The spelling of 101212102221221 in words is "one hundred one trillion, two hundred twelve billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty-one".