210110120220221 has 4 divisors (see below), whose sum is σ = 226272437160252. Its totient is φ = 193947803280192.

The previous prime is 210110120220173. The next prime is 210110120220239. The reversal of 210110120220221 is 122022021011012.

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 71141718048025 + 138968402172196 = 8434555^2 + 11788486^2 .

It is a de Polignac number, because none of the positive numbers 2^k-210110120220221 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 210110120220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210110120222221) 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, 8081158469996 + ... + 8081158470021.

It is an arithmetic number, because the mean of its divisors is an integer number (56568109290063).

Almost surely, 2^{210110120220221} is an apocalyptic number.

It is an amenable number.

210110120220221 is a deficient number, since it is larger than the sum of its proper divisors (16162316940031).

210110120220221 is a wasteful number, since it uses less digits than its factorization.

210110120220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16162316940030.

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

Adding to 210110120220221 its reverse (122022021011012), we get a palindrome (332132141231233).

The spelling of 210110120220221 in words is "two hundred ten trillion, one hundred ten billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".