111201022210221 has 24 divisors (see below), whose sum is σ = 166351914195480. Its totient is φ = 71496052822656.

The previous prime is 111201022210193. The next prime is 111201022210259. The reversal of 111201022210221 is 122012220102111.

111201022210221 is a `hidden beast` number, since 1 + 1 + 120 + 102 + 221 + 0 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20208711068100 + 90992311142121 = 4495410^2 + 9538989^2 .

It is not a de Polignac number, because 111201022210221 - 2³³ = 111192432275629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111201022210194 and 111201022210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201022210021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242677350 + ... + 243135143.

It is an arithmetic number, because the mean of its divisors is an integer number (6931329758145).

Almost surely, 2^{111201022210221} is an apocalyptic number.

It is an amenable number.

111201022210221 is a deficient number, since it is larger than the sum of its proper divisors (55150891985259).

111201022210221 is a wasteful number, since it uses less digits than its factorization.

111201022210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485813405 (or 485813402 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111201022210221 its reverse (122012220102111), we get a palindrome (233213242312332).

The spelling of 111201022210221 in words is "one hundred eleven trillion, two hundred one billion, twenty-two million, two hundred ten thousand, two hundred twenty-one".