111257867820 has 96 divisors (see below), whose sum is σ = 359832969216. Its totient is φ = 25385036800.

The previous prime is 111257867761. The next prime is 111257867843. The reversal of 111257867820 is 28768752111.

It is a self number, because there is not a number n which added to its sum of digits gives 111257867820.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4946796 + ... + 4969235.

It is an arithmetic number, because the mean of its divisors is an integer number (3748260096).

Almost surely, 2^111257867820 is an apocalyptic number.

111257867820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111257867820 is an abundant number, since it is smaller than the sum of its proper divisors (248575101396).

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

111257867820 is a wasteful number, since it uses less digits than its factorization.

111257867820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9916071 (or 9916069 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 111257867820 in words is "one hundred eleven billion, two hundred fifty-seven million, eight hundred sixty-seven thousand, eight hundred twenty".