111022220221 has 16 divisors (see below), whose sum is σ = 122958036288. Its totient is φ = 99394416000.

The previous prime is 111022220149. The next prime is 111022220291. The reversal of 111022220221 is 122022220111.

It is a happy number.

It is not a de Polignac number, because 111022220221 - 2⁹ = 111022219709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111022220195 and 111022220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022220291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2805271 + ... + 2844571.

It is an arithmetic number, because the mean of its divisors is an integer number (7684877268).

Almost surely, 2^111022220221 is an apocalyptic number.

111022220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111022220221 is a deficient number, since it is larger than the sum of its proper divisors (11935816067).

111022220221 is a wasteful number, since it uses less digits than its factorization.

111022220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43212.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111022220221 its reverse (122022220111), we get a palindrome (233044440332).

The spelling of 111022220221 in words is "one hundred eleven billion, twenty-two million, two hundred twenty thousand, two hundred twenty-one".