210110121 has 12 divisors (see below), whose sum is σ = 326838148. Its totient is φ = 129298464.

The previous prime is 210110119. The next prime is 210110141. The reversal of 210110121 is 121011012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65028096 + 145082025 = 8064^2 + 12045^2 .

It is not a de Polignac number, because 210110121 - 2¹ = 210110119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (210110111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 897790 + ... + 898023.

Almost surely, 2^210110121 is an apocalyptic number.

It is an amenable number.

210110121 is a deficient number, since it is larger than the sum of its proper divisors (116728027).

210110121 is a wasteful number, since it uses less digits than its factorization.

210110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795832 (or 1795829 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 210110121 is about 14495.1757836875. The cubic root of 210110121 is about 594.4960740462.

Adding to 210110121 its reverse (121011012), we get a palindrome (331121133).

The spelling of 210110121 in words is "two hundred ten million, one hundred ten thousand, one hundred twenty-one".