110012001221 has 4 divisors (see below), whose sum is σ = 110016023244. Its totient is φ = 110007979200.

The previous prime is 110012001199. The next prime is 110012001227. The reversal of 110012001221 is 122100210011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122100210011 = 13 ⋅9392323847.

It can be written as a sum of positive squares in 2 ways, for example, as 70883205121 + 39128796100 = 266239^2 + 197810^2 .

It is a cyclic number.

It is not a de Polignac number, because 110012001221 - 2⁶ = 110012001157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110012001227) 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, 1969700 + ... + 2024781.

It is an arithmetic number, because the mean of its divisors is an integer number (27504005811).

Almost surely, 2^110012001221 is an apocalyptic number.

It is an amenable number.

110012001221 is a deficient number, since it is larger than the sum of its proper divisors (4022023).

110012001221 is an equidigital number, since it uses as much as digits as its factorization.

110012001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022022.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 110012001221 its reverse (122100210011), we get a palindrome (232112211232).

The spelling of 110012001221 in words is "one hundred ten billion, twelve million, one thousand, two hundred twenty-one".