210100012122101 has 4 divisors (see below), whose sum is σ = 212978094480012. Its totient is φ = 207221929764192.

The previous prime is 210100012122023. The next prime is 210100012122107. The reversal of 210100012122101 is 101221210001012.

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 95863974730225 + 114236037391876 = 9791015^2 + 10688126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210100012122101 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 (210100012122107) 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, 1439041178846 + ... + 1439041178991.

It is an arithmetic number, because the mean of its divisors is an integer number (53244523620003).

Almost surely, 2^{210100012122101} is an apocalyptic number.

It is an amenable number.

210100012122101 is a deficient number, since it is larger than the sum of its proper divisors (2878082357911).

210100012122101 is an equidigital number, since it uses as much as digits as its factorization.

210100012122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878082357910.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210100012122101 its reverse (101221210001012), we get a palindrome (311321222123113).

The spelling of 210100012122101 in words is "two hundred ten trillion, one hundred billion, twelve million, one hundred twenty-two thousand, one hundred one".