210110221121 has 2 divisors, whose sum is σ = 210110221122. Its totient is φ = 210110221120.

The previous prime is 210110221093. The next prime is 210110221127. The reversal of 210110221121 is 121122011012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191900068096 + 18210153025 = 438064^2 + 134945^2 .

It is a cyclic number.

It is not a de Polignac number, because 210110221121 - 2¹⁴ = 210110204737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210110221096 and 210110221105.

It is not a weakly prime, because it can be changed into another prime (210110221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055110560 + 105055110561.

It is an arithmetic number, because the mean of its divisors is an integer number (105055110561).

Almost surely, 2^210110221121 is an apocalyptic number.

It is an amenable number.

210110221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210110221121 is an equidigital number, since it uses as much as digits as its factorization.

210110221121 is an evil number, because the sum of its binary digits is even.

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

Adding to 210110221121 its reverse (121122011012), we get a palindrome (331232232133).

The spelling of 210110221121 in words is "two hundred ten billion, one hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".