111231141021 has 96 divisors (see below), whose sum is σ = 216367027968. Its totient is φ = 53177886720.

The previous prime is 111231141011. The next prime is 111231141031. The reversal of 111231141021 is 120141132111.

111231141021 is a `hidden beast` number, since 1 + 1 + 1 + 231 + 1 + 410 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (111231141011) and next prime (111231141031).

It is not a de Polignac number, because 111231141021 - 2¹¹ = 111231138973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111231140985 and 111231141003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231141011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3017715 + ... + 3054351.

It is an arithmetic number, because the mean of its divisors is an integer number (2253823208).

Almost surely, 2^111231141021 is an apocalyptic number.

111231141021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111231141021 is a deficient number, since it is larger than the sum of its proper divisors (105135886947).

111231141021 is a wasteful number, since it uses less digits than its factorization.

111231141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37011 (or 37008 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 111231141021 its reverse (120141132111), we get a palindrome (231372273132).

It can be divided in two parts, 111231 and 141021, that added together give a palindrome (252252).

The spelling of 111231141021 in words is "one hundred eleven billion, two hundred thirty-one million, one hundred forty-one thousand, twenty-one".