111343743281 has 2 divisors, whose sum is σ = 111343743282. Its totient is φ = 111343743280.

The previous prime is 111343743263. The next prime is 111343743331. The reversal of 111343743281 is 182347343111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61633027600 + 49710715681 = 248260^2 + 222959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111343743281 is a prime.

It is a super-2 number, since 2×111343743281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111343743221) 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 as a sum of consecutive naturals, namely, 55671871640 + 55671871641.

It is an arithmetic number, because the mean of its divisors is an integer number (55671871641).

Almost surely, 2^111343743281 is an apocalyptic number.

It is an amenable number.

111343743281 is a deficient number, since it is larger than the sum of its proper divisors (1).

111343743281 is an equidigital number, since it uses as much as digits as its factorization.

111343743281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The spelling of 111343743281 in words is "one hundred eleven billion, three hundred forty-three million, seven hundred forty-three thousand, two hundred eighty-one".