111021022221 has 8 divisors (see below), whose sum is σ = 148034800320. Its totient is φ = 74010629472.

The previous prime is 111021022193. The next prime is 111021022283. The reversal of 111021022221 is 122220120111.

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

It is not a de Polignac number, because 111021022221 - 2⁷ = 111021022093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111021022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021020221) 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, 768801 + ... + 901718.

It is an arithmetic number, because the mean of its divisors is an integer number (18504350040).

Almost surely, 2^111021022221 is an apocalyptic number.

It is an amenable number.

111021022221 is a deficient number, since it is larger than the sum of its proper divisors (37013778099).

111021022221 is a wasteful number, since it uses less digits than its factorization.

111021022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692675.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111021022221 its reverse (122220120111), we get a palindrome (233241142332).

The spelling of 111021022221 in words is "one hundred eleven billion, twenty-one million, twenty-two thousand, two hundred twenty-one".