111111010221 has 8 divisors (see below), whose sum is σ = 148149628704. Its totient is φ = 74073199280.

The previous prime is 111111010217. The next prime is 111111010223. The reversal of 111111010221 is 122010111111.

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 111111010221 - 2² = 111111010217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111111010197 and 111111010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111010223) 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, 291235 + ... + 554111.

It is an arithmetic number, because the mean of its divisors is an integer number (18518703588).

Almost surely, 2^111111010221 is an apocalyptic number.

It is an amenable number.

111111010221 is a deficient number, since it is larger than the sum of its proper divisors (37038618483).

111111010221 is a wasteful number, since it uses less digits than its factorization.

111111010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403771.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111111010221 its reverse (122010111111), we get a palindrome (233121121332).

The spelling of 111111010221 in words is "one hundred eleven billion, one hundred eleven million, ten thousand, two hundred twenty-one".