211210012010101 has 4 divisors (see below), whose sum is σ = 227456936010892. Its totient is φ = 194963088009312.

The previous prime is 211210012010047. The next prime is 211210012010117. The reversal of 211210012010101 is 101010210012112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132280131716100 + 78929880294001 = 11501310^2 + 8884249^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210012010101 - 2¹⁷ = 211210011879029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16246924000777 = 211210012010101 / (2 + 1 + 1 + 2 + 1 + 0 + 0 + 1 + 2 + 0 + 1 + 0 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210012010161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8123462000376 + ... + 8123462000401.

It is an arithmetic number, because the mean of its divisors is an integer number (56864234002723).

Almost surely, 2^{211210012010101} is an apocalyptic number.

It is an amenable number.

211210012010101 is a deficient number, since it is larger than the sum of its proper divisors (16246924000791).

211210012010101 is a wasteful number, since it uses less digits than its factorization.

211210012010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16246924000790.

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

Adding to 211210012010101 its reverse (101010210012112), we get a palindrome (312220222022213).

The spelling of 211210012010101 in words is "two hundred eleven trillion, two hundred ten billion, twelve million, ten thousand, one hundred one".