210212200122101 has 4 divisors (see below), whose sum is σ = 212379336205932. Its totient is φ = 208045064038272.

The previous prime is 210212200122061. The next prime is 210212200122109. The reversal of 210212200122101 is 101221002212012.

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 134220357793201 + 75991842328900 = 11585351^2 + 8717330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210212200122101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210212200122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212200122109) 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, 1083568041770 + ... + 1083568041963.

It is an arithmetic number, because the mean of its divisors is an integer number (53094834051483).

Almost surely, 2^{210212200122101} is an apocalyptic number.

It is an amenable number.

210212200122101 is a deficient number, since it is larger than the sum of its proper divisors (2167136083831).

210212200122101 is an equidigital number, since it uses as much as digits as its factorization.

210212200122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167136083830.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210212200122101 its reverse (101221002212012), we get a palindrome (311433202334113).

The spelling of 210212200122101 in words is "two hundred ten trillion, two hundred twelve billion, two hundred million, one hundred twenty-two thousand, one hundred one".