201110110121 has 4 divisors (see below), whose sum is σ = 201119218692. Its totient is φ = 201101001552.

The previous prime is 201110110079. The next prime is 201110110127. The reversal of 201110110121 is 121011011102.

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 123667568896 + 77442541225 = 351664^2 + 278285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201110110121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201110110127) 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, 4521086 + ... + 4565351.

It is an arithmetic number, because the mean of its divisors is an integer number (50279804673).

Almost surely, 2^201110110121 is an apocalyptic number.

It is an amenable number.

201110110121 is a deficient number, since it is larger than the sum of its proper divisors (9108571).

201110110121 is an equidigital number, since it uses as much as digits as its factorization.

201110110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9108570.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 201110110121 its reverse (121011011102), we get a palindrome (322121121223).

The spelling of 201110110121 in words is "two hundred one billion, one hundred ten million, one hundred ten thousand, one hundred twenty-one".