111100220221221 has 24 divisors (see below), whose sum is σ = 200076587066304. Its totient is φ = 57714400114560.

The previous prime is 111100220221219. The next prime is 111100220221223. The reversal of 111100220221221 is 122122022001111.

111100220221221 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 0 + 0 + 220 + 221 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (111100220221219) and next prime (111100220221223).

It is not a de Polignac number, because 111100220221221 - 2¹ = 111100220221219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111100220221194 and 111100220221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100220221223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80158888356 + ... + 80158889741.

It is an arithmetic number, because the mean of its divisors is an integer number (8336524461096).

Almost surely, 2^{111100220221221} is an apocalyptic number.

111100220221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111100220221221 is a deficient number, since it is larger than the sum of its proper divisors (88976366845083).

111100220221221 is a wasteful number, since it uses less digits than its factorization.

111100220221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160317778121 (or 160317778118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111100220221221 its reverse (122122022001111), we get a palindrome (233222242222332).

The spelling of 111100220221221 in words is "one hundred eleven trillion, one hundred billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".