110111212212121 has 4 divisors (see below), whose sum is σ = 110719561451044. Its totient is φ = 109502862973200.

The previous prime is 110111212212109. The next prime is 110111212212161. The reversal of 110111212212121 is 121212212111011.

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 9628230437721 + 100482981774400 = 3102939^2 + 10024120^2 .

It is a cyclic number.

It is not a de Polignac number, because 110111212212121 - 2⁷ = 110111212211993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (110111212212161) 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, 304174619190 + ... + 304174619551.

It is an arithmetic number, because the mean of its divisors is an integer number (27679890362761).

Almost surely, 2^{110111212212121} is an apocalyptic number.

It is an amenable number.

110111212212121 is a deficient number, since it is larger than the sum of its proper divisors (608349238923).

110111212212121 is an equidigital number, since it uses as much as digits as its factorization.

110111212212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608349238922.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 110111212212121 its reverse (121212212111011), we get a palindrome (231323424323132).

The spelling of 110111212212121 in words is "one hundred ten trillion, one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-one".