111000212222221 has 8 divisors (see below), whose sum is σ = 127192101456320. Its totient is φ = 94892002003008.

The previous prime is 111000212222209. The next prime is 111000212222257. The reversal of 111000212222221 is 122222212000111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111000212222221 - 2⁵ = 111000212222189 is a prime.

It is a super-2 number, since 2×111000212222221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000212228221) 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, 20919750876 + ... + 20919756181.

It is an arithmetic number, because the mean of its divisors is an integer number (15899012682040).

Almost surely, 2^{111000212222221} is an apocalyptic number.

It is an amenable number.

111000212222221 is a deficient number, since it is larger than the sum of its proper divisors (16191889234099).

111000212222221 is an equidigital number, since it uses as much as digits as its factorization.

111000212222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41839507443.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111000212222221 its reverse (122222212000111), we get a palindrome (233222424222332).

The spelling of 111000212222221 in words is "one hundred eleven trillion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".