111122102020221 has 24 divisors (see below), whose sum is σ = 160790118985080. Its totient is φ = 73951982125056.

The previous prime is 111122102020219. The next prime is 111122102020261. The reversal of 111122102020221 is 122020201221111.

111122102020221 is a `hidden beast` number, since 11 + 11 + 221 + 0 + 202 + 0 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 82926320619321 + 28195781400900 = 9106389^2 + 5309970^2 .

It is not a de Polignac number, because 111122102020221 - 2¹ = 111122102020219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111122102020194 and 111122102020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122102020261) 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, 630825085 + ... + 631001213.

It is an arithmetic number, because the mean of its divisors is an integer number (6699588291045).

Almost surely, 2^{111122102020221} is an apocalyptic number.

It is an amenable number.

111122102020221 is a deficient number, since it is larger than the sum of its proper divisors (49668016964859).

111122102020221 is a wasteful number, since it uses less digits than its factorization.

111122102020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298205 (or 298202 counting only the distinct ones).

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

Adding to 111122102020221 its reverse (122020201221111), we get a palindrome (233142303241332).

The spelling of 111122102020221 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred two million, twenty thousand, two hundred twenty-one".