111203203111231 has 48 divisors (see below), whose sum is σ = 148574676850560. Its totient is φ = 82075387907520.

The previous prime is 111203203111219. The next prime is 111203203111279. The reversal of 111203203111231 is 132111302302111.

It is not a de Polignac number, because 111203203111231 - 2¹⁷ = 111203202980159 is a prime.

It is a super-2 number, since 2×111203203111231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111203203141231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52177776 + ... + 54267178.

It is an arithmetic number, because the mean of its divisors is an integer number (3095305767720).

Almost surely, 2^{111203203111231} is an apocalyptic number.

111203203111231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111203203111231 is a deficient number, since it is larger than the sum of its proper divisors (37371473739329).

111203203111231 is a wasteful number, since it uses less digits than its factorization.

111203203111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094644 (or 2094637 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 111203203111231 its reverse (132111302302111), we get a palindrome (243314505413342).

The spelling of 111203203111231 in words is "one hundred eleven trillion, two hundred three billion, two hundred three million, one hundred eleven thousand, two hundred thirty-one".