111100211221231 has 2 divisors, whose sum is σ = 111100211221232. Its totient is φ = 111100211221230.

The previous prime is 111100211221189. The next prime is 111100211221283. The reversal of 111100211221231 is 132122112001111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111100211221231 - 2³⁷ = 110962772267759 is a prime.

It is a super-2 number, since 2×111100211221231² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111100211221199 and 111100211221208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111100211261231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550105610615 + 55550105610616.

It is an arithmetic number, because the mean of its divisors is an integer number (55550105610616).

Almost surely, 2^{111100211221231} is an apocalyptic number.

111100211221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100211221231 is an equidigital number, since it uses as much as digits as its factorization.

111100211221231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 111100211221231 its reverse (132122112001111), we get a palindrome (243222323222342).

The spelling of 111100211221231 in words is "one hundred eleven trillion, one hundred billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirty-one".