201210101012101 has 4 divisors (see below), whose sum is σ = 201210188949100. Its totient is φ = 201210013075104.

The previous prime is 201210101012077. The next prime is 201210101012147. The reversal of 201210101012101 is 101210101012102.

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 132002842584001 + 69207258428100 = 11489249^2 + 8319090^2 .

It is a cyclic number.

It is not a de Polignac number, because 201210101012101 - 2⁷ = 201210101011973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210101012171) 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, 40442046 + ... + 45143983.

It is an arithmetic number, because the mean of its divisors is an integer number (50302547237275).

Almost surely, 2^{201210101012101} is an apocalyptic number.

It is an amenable number.

201210101012101 is a deficient number, since it is larger than the sum of its proper divisors (87936999).

201210101012101 is an equidigital number, since it uses as much as digits as its factorization.

201210101012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87936998.

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

Adding to 201210101012101 its reverse (101210101012102), we get a palindrome (302420202024203).

Subtracting from 201210101012101 its reverse (101210101012102), we obtain a palindrome (99999999999999).

The spelling of 201210101012101 in words is "two hundred one trillion, two hundred ten billion, one hundred one million, twelve thousand, one hundred one".