21111003311104 has 44 divisors (see below), whose sum is σ = 48230160482704. Its totient is φ = 9047572844544.

The previous prime is 21111003311087. The next prime is 21111003311129. The reversal of 21111003311104 is 40111330011112.

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 3 ways as a sum of consecutive naturals, for example, 1472579559 + ... + 1472593894.

Almost surely, 2^{21111003311104} is an apocalyptic number.

It is an amenable number.

21111003311104 is an abundant number, since it is smaller than the sum of its proper divisors (27119157171600).

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

21111003311104 is an equidigital number, since it uses as much as digits as its factorization.

21111003311104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945173480 (or 2945173462 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21111003311104 its reverse (40111330011112), we get a palindrome (61222333322216).

The spelling of 21111003311104 in words is "twenty-one trillion, one hundred eleven billion, three million, three hundred eleven thousand, one hundred four".