210010122101221 has 4 divisors (see below), whose sum is σ = 226164746878252. Its totient is φ = 193855497324192.

The previous prime is 210010122101203. The next prime is 210010122101231. The reversal of 210010122101221 is 122101221010012.

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 69924883652100 + 140085238449121 = 8362110^2 + 11835761^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010122101221 - 2⁷ = 210010122101093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210010122101195 and 210010122101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010122101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8077312388496 + ... + 8077312388521.

It is an arithmetic number, because the mean of its divisors is an integer number (56541186719563).

Almost surely, 2^{210010122101221} is an apocalyptic number.

It is an amenable number.

210010122101221 is a deficient number, since it is larger than the sum of its proper divisors (16154624777031).

210010122101221 is a wasteful number, since it uses less digits than its factorization.

210010122101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16154624777030.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210010122101221 its reverse (122101221010012), we get a palindrome (332111343111233).

The spelling of 210010122101221 in words is "two hundred ten trillion, ten billion, one hundred twenty-two million, one hundred one thousand, two hundred twenty-one".