211010021100121 has 2 divisors, whose sum is σ = 211010021100122. Its totient is φ = 211010021100120.

The previous prime is 211010021100113. The next prime is 211010021100163. The reversal of 211010021100121 is 121001120010112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204210130424521 + 6799890675600 = 14290211^2 + 2607660^2 .

It is a cyclic number.

It is not a de Polignac number, because 211010021100121 - 2³ = 211010021100113 is a prime.

It is not a weakly prime, because it can be changed into another prime (211010021100191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505010550060 + 105505010550061.

It is an arithmetic number, because the mean of its divisors is an integer number (105505010550061).

Almost surely, 2^{211010021100121} is an apocalyptic number.

It is an amenable number.

211010021100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211010021100121 is an equidigital number, since it uses as much as digits as its factorization.

211010021100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211010021100121 its reverse (121001120010112), we get a palindrome (332011141110233).

The spelling of 211010021100121 in words is "two hundred eleven trillion, ten billion, twenty-one million, one hundred thousand, one hundred twenty-one".