111100210222221 has 128 divisors (see below), whose sum is σ = 183331168819200. Its totient is φ = 65932797934080.

The previous prime is 111100210222219. The next prime is 111100210222247. The reversal of 111100210222221 is 122222012001111.

111100210222221 is a `hidden beast` number, since 1 + 1 + 1 + 10 + 0 + 210 + 222 + 221 = 666.

It is not a de Polignac number, because 111100210222221 - 2¹ = 111100210222219 is a prime.

It is a super-2 number, since 2×111100210222221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111100210222194 and 111100210222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100210222291) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13358203155 + ... + 13358211471.

It is an arithmetic number, because the mean of its divisors is an integer number (1432274756400).

Almost surely, 2^{111100210222221} is an apocalyptic number.

111100210222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111100210222221 is a deficient number, since it is larger than the sum of its proper divisors (72230958596979).

111100210222221 is a wasteful number, since it uses less digits than its factorization.

111100210222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13256 (or 13250 counting only the distinct ones).

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

Adding to 111100210222221 its reverse (122222012001111), we get a palindrome (233322222223332).

The spelling of 111100210222221 in words is "one hundred eleven trillion, one hundred billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".