111021011022221 has 8 divisors (see below), whose sum is σ = 115848117705024. Its totient is φ = 106193913189760.

The previous prime is 111021011022217. The next prime is 111021011022239. The reversal of 111021011022221 is 122220110120111.

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 111021011022221 - 2² = 111021011022217 is a prime.

It is a super-3 number, since 3×111021011022221³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 111021011022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021011022421) 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, 43633130 + ... + 46107396.

It is an arithmetic number, because the mean of its divisors is an integer number (14481014713128).

Almost surely, 2^{111021011022221} is an apocalyptic number.

It is an amenable number.

111021011022221 is a deficient number, since it is larger than the sum of its proper divisors (4827106682803).

111021011022221 is a wasteful number, since it uses less digits than its factorization.

111021011022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425171.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111021011022221 its reverse (122220110120111), we get a palindrome (233241121142332).

The spelling of 111021011022221 in words is "one hundred eleven trillion, twenty-one billion, eleven million, twenty-two thousand, two hundred twenty-one".