111505404420 has 72 divisors (see below), whose sum is σ = 346098969216. Its totient is φ = 29043266112.

The previous prime is 111505404371. The next prime is 111505404467. The reversal of 111505404420 is 24404505111.

111505404420 is a `hidden beast` number, since 1 + 11 + 50 + 540 + 44 + 20 = 666.

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 23 ways as a sum of consecutive naturals, for example, 7195452 + ... + 7210931.

It is an arithmetic number, because the mean of its divisors is an integer number (4806930128).

Almost surely, 2^111505404420 is an apocalyptic number.

111505404420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111505404420 is an abundant number, since it is smaller than the sum of its proper divisors (234593564796).

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

111505404420 is a wasteful number, since it uses less digits than its factorization.

111505404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14406441 (or 14406436 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 111505404420 its reverse (24404505111), we get a palindrome (135909909531).

The spelling of 111505404420 in words is "one hundred eleven billion, five hundred five million, four hundred four thousand, four hundred twenty".