111421131234243 has 4 divisors (see below), whose sum is σ = 148561508312328. Its totient is φ = 74280754156160.

The previous prime is 111421131234241. The next prime is 111421131234277. The reversal of 111421131234243 is 342432131124111.

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 111421131234243 - 2¹ = 111421131234241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111421131234241) 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 3 ways as a sum of consecutive naturals, for example, 18570188539038 + ... + 18570188539043.

It is an arithmetic number, because the mean of its divisors is an integer number (37140377078082).

Almost surely, 2^{111421131234243} is an apocalyptic number.

111421131234243 is a deficient number, since it is larger than the sum of its proper divisors (37140377078085).

111421131234243 is an equidigital number, since it uses as much as digits as its factorization.

111421131234243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37140377078084.

The product of its digits is 13824, while the sum is 33.

Adding to 111421131234243 its reverse (342432131124111), we get a palindrome (453853262358354).

The spelling of 111421131234243 in words is "one hundred eleven trillion, four hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-four thousand, two hundred forty-three".