210210110211121 has 4 divisors (see below), whose sum is σ = 210623096675700. Its totient is φ = 209797123746544.

The previous prime is 210210110211083. The next prime is 210210110211137. The reversal of 210210110211121 is 121112011012012.

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 115341263487025 + 94868846724096 = 10739705^2 + 9740064^2 .

It is a cyclic number.

It is not a de Polignac number, because 210210110211121 - 2¹⁷ = 210210110080049 is a prime.

It is a super-2 number, since 2×210210110211121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210210110211095 and 210210110211104.

It is not an unprimeable number, because it can be changed into a prime (210210110271121) 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, 206493231526 + ... + 206493232543.

It is an arithmetic number, because the mean of its divisors is an integer number (52655774168925).

Almost surely, 2^{210210110211121} is an apocalyptic number.

It is an amenable number.

210210110211121 is a deficient number, since it is larger than the sum of its proper divisors (412986464579).

210210110211121 is an equidigital number, since it uses as much as digits as its factorization.

210210110211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412986464578.

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

Adding to 210210110211121 its reverse (121112011012012), we get a palindrome (331322121223133).

The spelling of 210210110211121 in words is "two hundred ten trillion, two hundred ten billion, one hundred ten million, two hundred eleven thousand, one hundred twenty-one".