110001221221 has 16 divisors (see below), whose sum is σ = 119833459200. Its totient is φ = 100590552000.

The previous prime is 110001221189. The next prime is 110001221243. The reversal of 110001221221 is 122122100011.

It is a cyclic number.

It is not a de Polignac number, because 110001221221 - 2⁵ = 110001221189 is a prime.

It is a super-2 number, since 2×110001221221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001221021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10930 + ... + 469171.

It is an arithmetic number, because the mean of its divisors is an integer number (7489591200).

Almost surely, 2^110001221221 is an apocalyptic number.

It is an amenable number.

110001221221 is a deficient number, since it is larger than the sum of its proper divisors (9832237979).

110001221221 is a wasteful number, since it uses less digits than its factorization.

110001221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480540.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 110001221221 its reverse (122122100011), we get a palindrome (232123321232).

The spelling of 110001221221 in words is "one hundred ten billion, one million, two hundred twenty-one thousand, two hundred twenty-one".