111441434043421 has 8 divisors (see below), whose sum is σ = 113660319758904. Its totient is φ = 109226852666880.

The previous prime is 111441434043361. The next prime is 111441434043463. The reversal of 111441434043421 is 124340434144111.

It can be written as a sum of positive squares in 4 ways, for example, as 46894912256196 + 64546521787225 = 6847986^2 + 8034085^2 .

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 111441434043421 - 2¹¹ = 111441434041373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111441434043491) 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, 1076032440 + ... + 1076136001.

It is an arithmetic number, because the mean of its divisors is an integer number (14207539969863).

Almost surely, 2^{111441434043421} is an apocalyptic number.

It is an amenable number.

111441434043421 is a deficient number, since it is larger than the sum of its proper divisors (2218885715483).

111441434043421 is an equidigital number, since it uses as much as digits as its factorization.

111441434043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152169471.

The product of its (nonzero) digits is 73728, while the sum is 37.

Adding to 111441434043421 its reverse (124340434144111), we get a palindrome (235781868187532).

The spelling of 111441434043421 in words is "one hundred eleven trillion, four hundred forty-one billion, four hundred thirty-four million, forty-three thousand, four hundred twenty-one".