111200012221 has 4 divisors (see below), whose sum is σ = 111203032572. Its totient is φ = 111196991872.

The previous prime is 111200012141. The next prime is 111200012233. The reversal of 111200012221 is 122210002111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122210002111 = 12227 ⋅9995093.

It can be written as a sum of positive squares in 2 ways, for example, as 30410476996 + 80789535225 = 174386^2 + 284235^2 .

It is a cyclic number.

It is not a de Polignac number, because 111200012221 - 2⁹ = 111200011709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200010221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454260 + ... + 1528813.

It is an arithmetic number, because the mean of its divisors is an integer number (27800758143).

Almost surely, 2^111200012221 is an apocalyptic number.

It is an amenable number.

111200012221 is a deficient number, since it is larger than the sum of its proper divisors (3020351).

111200012221 is an equidigital number, since it uses as much as digits as its factorization.

111200012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020350.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111200012221 its reverse (122210002111), we get a palindrome (233410014332).

The spelling of 111200012221 in words is "one hundred eleven billion, two hundred million, twelve thousand, two hundred twenty-one".