111204320421 has 32 divisors (see below), whose sum is σ = 159023329920. Its totient is φ = 68877213696.

The previous prime is 111204320417. The next prime is 111204320471. The reversal of 111204320421 is 124023402111.

It is not a de Polignac number, because 111204320421 - 2² = 111204320417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111204320471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1895490 + ... + 1953276.

It is an arithmetic number, because the mean of its divisors is an integer number (4969479060).

Almost surely, 2^111204320421 is an apocalyptic number.

It is an amenable number.

111204320421 is a deficient number, since it is larger than the sum of its proper divisors (47819009499).

111204320421 is a wasteful number, since it uses less digits than its factorization.

111204320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58293.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 111204320421 its reverse (124023402111), we get a palindrome (235227722532).

The spelling of 111204320421 in words is "one hundred eleven billion, two hundred four million, three hundred twenty thousand, four hundred twenty-one".