111122002100221 has 6 divisors (see below), whose sum is σ = 129264369790110. Its totient is φ = 95247430371576.

The previous prime is 111122002100173. The next prime is 111122002100261. The reversal of 111122002100221 is 122001200221111.

It can be written as a sum of positive squares in only one way, i.e., 102289152716100 + 8832849384121 = 10113810^2 + 2972011^2 .

It is not a de Polignac number, because 111122002100221 - 2¹⁹ = 111122001575933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111122002100195 and 111122002100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122002100261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1133897980566 + ... + 1133897980663.

It is an arithmetic number, because the mean of its divisors is an integer number (21544061631685).

Almost surely, 2^{111122002100221} is an apocalyptic number.

It is an amenable number.

111122002100221 is a deficient number, since it is larger than the sum of its proper divisors (18142367689889).

111122002100221 is an equidigital number, since it uses as much as digits as its factorization.

111122002100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267795961243 (or 2267795961236 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111122002100221 its reverse (122001200221111), we get a palindrome (233123202321332).

The spelling of 111122002100221 in words is "one hundred eleven trillion, one hundred twenty-two billion, two million, one hundred thousand, two hundred twenty-one".