1110111012221 has 2 divisors, whose sum is σ = 1110111012222. Its totient is φ = 1110111012220.

The previous prime is 1110111012169. The next prime is 1110111012223. The reversal of 1110111012221 is 1222101110111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655314535225 + 454796476996 = 809515^2 + 674386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110111012221 - 2³⁸ = 835233105277 is a prime.

It is a super-2 number, since 2×1110111012221² (a number of 25 digits) contains 22 as substring.

Together with 1110111012223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1110111012196 and 1110111012205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110111012223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555055506110 + 555055506111.

It is an arithmetic number, because the mean of its divisors is an integer number (555055506111).

Almost surely, 2^{1110111012221} is an apocalyptic number.

It is an amenable number.

1110111012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110111012221 is an equidigital number, since it uses as much as digits as its factorization.

1110111012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1110111012221 its reverse (1222101110111), we get a palindrome (2332212122332).

The spelling of 1110111012221 in words is "one trillion, one hundred ten billion, one hundred eleven million, twelve thousand, two hundred twenty-one".