111122120231 has 4 divisors (see below), whose sum is σ = 111858028464. Its totient is φ = 110386212000.

The previous prime is 111122120183. The next prime is 111122120267. The reversal of 111122120231 is 132021221111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111122120231 - 2²² = 111117925927 is a prime.

It is a super-2 number, since 2×111122120231² (a number of 23 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 (111122120281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367953890 + ... + 367954191.

It is an arithmetic number, because the mean of its divisors is an integer number (27964507116).

Almost surely, 2^111122120231 is an apocalyptic number.

111122120231 is a deficient number, since it is larger than the sum of its proper divisors (735908233).

111122120231 is an equidigital number, since it uses as much as digits as its factorization.

111122120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735908232.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111122120231 its reverse (132021221111), we get a palindrome (243143341342).

The spelling of 111122120231 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty thousand, two hundred thirty-one".