111442041221 has 16 divisors (see below), whose sum is σ = 127740923904. Its totient is φ = 95237990784.

The previous prime is 111442041187. The next prime is 111442041241. The reversal of 111442041221 is 122140244111.

It is a cyclic number.

It is not a de Polignac number, because 111442041221 - 2¹⁰ = 111442040197 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 (111442041241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9841655 + ... + 9852971.

It is an arithmetic number, because the mean of its divisors is an integer number (7983807744).

Almost surely, 2^111442041221 is an apocalyptic number.

It is an amenable number.

111442041221 is a deficient number, since it is larger than the sum of its proper divisors (16298882683).

111442041221 is a wasteful number, since it uses less digits than its factorization.

111442041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 111442041221 its reverse (122140244111), we get a palindrome (233582285332).

The spelling of 111442041221 in words is "one hundred eleven billion, four hundred forty-two million, forty-one thousand, two hundred twenty-one".