111120101018221 has 2 divisors, whose sum is σ = 111120101018222. Its totient is φ = 111120101018220.

The previous prime is 111120101018203. The next prime is 111120101018233. The reversal of 111120101018221 is 122810101021111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97918723461321 + 13201377556900 = 9895389^2 + 3633370^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120101018221 - 2¹³ = 111120101010029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111120101018192 and 111120101018201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120101018261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560050509110 + 55560050509111.

It is an arithmetic number, because the mean of its divisors is an integer number (55560050509111).

Almost surely, 2^{111120101018221} is an apocalyptic number.

It is an amenable number.

111120101018221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120101018221 is an equidigital number, since it uses as much as digits as its factorization.

111120101018221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 22.

Adding to 111120101018221 its reverse (122810101021111), we get a palindrome (233930202039332).

The spelling of 111120101018221 in words is "one hundred eleven trillion, one hundred twenty billion, one hundred one million, eighteen thousand, two hundred twenty-one".