111211230031 has 8 divisors (see below), whose sum is σ = 122857056000. Its totient is φ = 99821356440.

The previous prime is 111211230017. The next prime is 111211230049. The reversal of 111211230031 is 130032112111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111211230031 - 2⁵ = 111211229999 is a prime.

It is a super-2 number, since 2×111211230031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211229987 and 111211230014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211233031) 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, 63987181 + ... + 63988918.

It is an arithmetic number, because the mean of its divisors is an integer number (15357132000).

Almost surely, 2^111211230031 is an apocalyptic number.

111211230031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111211230031 is a deficient number, since it is larger than the sum of its proper divisors (11645825969).

111211230031 is a wasteful number, since it uses less digits than its factorization.

111211230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127976189.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111211230031 its reverse (130032112111), we get a palindrome (241243342142).

The spelling of 111211230031 in words is "one hundred eleven billion, two hundred eleven million, two hundred thirty thousand, thirty-one".