111001020021221 has 8 divisors (see below), whose sum is σ = 121092709533600. Its totient is φ = 100909445124240.

The previous prime is 111001020021191. The next prime is 111001020021257. The reversal of 111001020021221 is 122120020100111.

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 111001020021221 - 2¹⁰ = 111001020020197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111001020021196 and 111001020021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001020051221) 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, 26622611 + ... + 30508448.

It is an arithmetic number, because the mean of its divisors is an integer number (15136588691700).

Almost surely, 2^{111001020021221} is an apocalyptic number.

111001020021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111001020021221 is a deficient number, since it is larger than the sum of its proper divisors (10091689512379).

111001020021221 is a wasteful number, since it uses less digits than its factorization.

111001020021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57307699.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111001020021221 its reverse (122120020100111), we get a palindrome (233121040121332).

The spelling of 111001020021221 in words is "one hundred eleven trillion, one billion, twenty million, twenty-one thousand, two hundred twenty-one".