111515552420 has 24 divisors (see below), whose sum is σ = 239628770304. Its totient is φ = 43568866656.

The previous prime is 111515552399. The next prime is 111515552453. The reversal of 111515552420 is 24255515111.

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, 64833764 + ... + 64835483.

It is an arithmetic number, because the mean of its divisors is an integer number (9984532096).

Almost surely, 2^111515552420 is an apocalyptic number.

111515552420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111515552420 is an abundant number, since it is smaller than the sum of its proper divisors (128113217884).

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

111515552420 is a wasteful number, since it uses less digits than its factorization.

111515552420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129669299 (or 129669297 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 32.

The spelling of 111515552420 in words is "one hundred eleven billion, five hundred fifteen million, five hundred fifty-two thousand, four hundred twenty".