111021122221 has 8 divisors (see below), whose sum is σ = 116872156800. Its totient is φ = 105170869440.

The previous prime is 111021122161. The next prime is 111021122231. The reversal of 111021122221 is 122221120111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021122221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021122195 and 111021122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021122231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108156 + ... + 483466.

It is an arithmetic number, because the mean of its divisors is an integer number (14609019600).

Almost surely, 2^111021122221 is an apocalyptic number.

It is an amenable number.

111021122221 is a deficient number, since it is larger than the sum of its proper divisors (5851034579).

111021122221 is a wasteful number, since it uses less digits than its factorization.

111021122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390899.

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

Adding to 111021122221 its reverse (122221120111), we get a palindrome (233242242332).

The spelling of 111021122221 in words is "one hundred eleven billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".