111421510040 has 32 divisors (see below), whose sum is σ = 261598330080. Its totient is φ = 42630838272.

The previous prime is 111421510037. The next prime is 111421510049. The reversal of 111421510040 is 40015124111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111421509994 and 111421510021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421510049) 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 in 7 ways as a sum of consecutive naturals, for example, 60554249 + ... + 60556088.

It is an arithmetic number, because the mean of its divisors is an integer number (8174947815).

Almost surely, 2^111421510040 is an apocalyptic number.

111421510040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111421510040 is an abundant number, since it is smaller than the sum of its proper divisors (150176820040).

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

111421510040 is a wasteful number, since it uses less digits than its factorization.

111421510040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121110371 (or 121110367 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 111421510040 its reverse (40015124111), we get a palindrome (151436634151).

The spelling of 111421510040 in words is "one hundred eleven billion, four hundred twenty-one million, five hundred ten thousand, forty".