111122220221 has 8 divisors (see below), whose sum is σ = 112600398144. Its totient is φ = 109651721760.

The previous prime is 111122220211. The next prime is 111122220227. The reversal of 111122220221 is 122022221111.

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

It is a cyclic number.

It is not a de Polignac number, because 111122220221 - 2¹⁴ = 111122203837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111122220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122220227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1890731 + ... + 1948616.

It is an arithmetic number, because the mean of its divisors is an integer number (14075049768).

Almost surely, 2^111122220221 is an apocalyptic number.

It is an amenable number.

111122220221 is a deficient number, since it is larger than the sum of its proper divisors (1478177923).

111122220221 is a wasteful number, since it uses less digits than its factorization.

111122220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839731.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111122220221 its reverse (122022221111), we get a palindrome (233144441332).

The spelling of 111122220221 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".