21111003113 has 24 divisors (see below), whose sum is σ = 22812451200. Its totient is φ = 19524670560.

The previous prime is 21111003091. The next prime is 21111003119. The reversal of 21111003113 is 31130011112.

It is a happy number.

It is not a de Polignac number, because 21111003113 - 2²² = 21106808809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111003119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7820438 + ... + 7823136.

It is an arithmetic number, because the mean of its divisors is an integer number (950518800).

Almost surely, 2^21111003113 is an apocalyptic number.

It is an amenable number.

21111003113 is a deficient number, since it is larger than the sum of its proper divisors (1701448087).

21111003113 is a wasteful number, since it uses less digits than its factorization.

21111003113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245 (or 3226 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21111003113 its reverse (31130011112), we get a palindrome (52241014225).

The spelling of 21111003113 in words is "twenty-one billion, one hundred eleven million, three thousand, one hundred thirteen".