110211312121 has 4 divisors (see below), whose sum is σ = 110609187172. Its totient is φ = 109813437072.

The previous prime is 110211312053. The next prime is 110211312151. The reversal of 110211312121 is 121213112011.

It is a happy number.

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 48602611600 + 61608700521 = 220460^2 + 248211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110211312121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110211312095 and 110211312104.

It is not an unprimeable number, because it can be changed into a prime (110211312151) 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, 198937110 + ... + 198937663.

It is an arithmetic number, because the mean of its divisors is an integer number (27652296793).

Almost surely, 2^110211312121 is an apocalyptic number.

It is an amenable number.

110211312121 is a deficient number, since it is larger than the sum of its proper divisors (397875051).

110211312121 is an equidigital number, since it uses as much as digits as its factorization.

110211312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397875050.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 110211312121 its reverse (121213112011), we get a palindrome (231424424132).

The spelling of 110211312121 in words is "one hundred ten billion, two hundred eleven million, three hundred twelve thousand, one hundred twenty-one".