111220210231 has 16 divisors (see below), whose sum is σ = 124638433920. Its totient is φ = 98577612000.

The previous prime is 111220210217. The next prime is 111220210237. The reversal of 111220210231 is 132012022111.

It is a cyclic number.

It is not a de Polignac number, because 111220210231 - 2¹⁵ = 111220177463 is a prime.

It is a super-2 number, since 2×111220210231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220210237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1653145 + ... + 1719106.

It is an arithmetic number, because the mean of its divisors is an integer number (7789902120).

Almost surely, 2^111220210231 is an apocalyptic number.

111220210231 is a deficient number, since it is larger than the sum of its proper divisors (13418223689).

111220210231 is a wasteful number, since it uses less digits than its factorization.

111220210231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372366.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111220210231 its reverse (132012022111), we get a palindrome (243232232342).

The spelling of 111220210231 in words is "one hundred eleven billion, two hundred twenty million, two hundred ten thousand, two hundred thirty-one".