111020330221 has 4 divisors (see below), whose sum is σ = 114848617500. Its totient is φ = 107192042944.

The previous prime is 111020330209. The next prime is 111020330227. The reversal of 111020330221 is 122033020111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122033020111 = 73 ⋅1671685207.

It can be written as a sum of positive squares in 2 ways, for example, as 74357654596 + 36662675625 = 272686^2 + 191475^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020330221 - 2⁷ = 111020330093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020330195 and 111020330204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020330227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914143596 + ... + 1914143653.

It is an arithmetic number, because the mean of its divisors is an integer number (28712154375).

Almost surely, 2^111020330221 is an apocalyptic number.

It is an amenable number.

111020330221 is a deficient number, since it is larger than the sum of its proper divisors (3828287279).

111020330221 is an equidigital number, since it uses as much as digits as its factorization.

111020330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828287278.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 111020330221 its reverse (122033020111), we get a palindrome (233053350332).

The spelling of 111020330221 in words is "one hundred eleven billion, twenty million, three hundred thirty thousand, two hundred twenty-one".