210001212101 has 4 divisors (see below), whose sum is σ = 210083794752. Its totient is φ = 209918629452.

The previous prime is 210001212073. The next prime is 210001212151. The reversal of 210001212101 is 101212100012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210001212101 - 2¹⁴ = 210001195717 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 (210001212151) 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, 41287511 + ... + 41292596.

It is an arithmetic number, because the mean of its divisors is an integer number (52520948688).

Almost surely, 2^210001212101 is an apocalyptic number.

It is an amenable number.

210001212101 is a deficient number, since it is larger than the sum of its proper divisors (82582651).

210001212101 is an equidigital number, since it uses as much as digits as its factorization.

210001212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82582650.

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

Adding to 210001212101 its reverse (101212100012), we get a palindrome (311213312113).

The spelling of 210001212101 in words is "two hundred ten billion, one million, two hundred twelve thousand, one hundred one".