111421321024 has 56 divisors (see below), whose sum is σ = 238151180288. Its totient is φ = 51416225280.

The previous prime is 111421321009. The next prime is 111421321057. The reversal of 111421321024 is 420123124111.

It is a junction number, because it is equal to n+sod(n) for n = 111421320986 and 111421321004.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8205889 + ... + 8219455.

It is an arithmetic number, because the mean of its divisors is an integer number (4252699648).

Almost surely, 2^111421321024 is an apocalyptic number.

It is an amenable number.

111421321024 is an abundant number, since it is smaller than the sum of its proper divisors (126729859264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111421321024 is a wasteful number, since it uses less digits than its factorization.

111421321024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23463 (or 23453 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 111421321024 its reverse (420123124111), we get a palindrome (531544445135).

The spelling of 111421321024 in words is "one hundred eleven billion, four hundred twenty-one million, three hundred twenty-one thousand, twenty-four".