21109200191112 has 64 divisors (see below), whose sum is σ = 57585831552000. Its totient is φ = 6395028933440.

The previous prime is 21109200191039. The next prime is 21109200191159. The reversal of 21109200191112 is 21119100290112.

It is a self number, because there is not a number n which added to its sum of digits gives 21109200191112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9618612 + ... + 11607587.

It is an arithmetic number, because the mean of its divisors is an integer number (899778618000).

Almost surely, 2^{21109200191112} is an apocalyptic number.

21109200191112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21109200191112 is an abundant number, since it is smaller than the sum of its proper divisors (36476631360888).

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

21109200191112 is a wasteful number, since it uses less digits than its factorization.

21109200191112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21229986 (or 21229982 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

It can be divided in two parts, 21109200 and 191112, that added together give a palindrome (21300312).

The spelling of 21109200191112 in words is "twenty-one trillion, one hundred nine billion, two hundred million, one hundred ninety-one thousand, one hundred twelve".