21110111032 has 8 divisors (see below), whose sum is σ = 39581458200. Its totient is φ = 10555055512.

The previous prime is 21110111003. The next prime is 21110111041. The reversal of 21110111032 is 23011101112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319381932 + ... + 1319381947.

It is an arithmetic number, because the mean of its divisors is an integer number (4947682275).

Almost surely, 2^21110111032 is an apocalyptic number.

It is an amenable number.

21110111032 is a deficient number, since it is larger than the sum of its proper divisors (18471347168).

21110111032 is a wasteful number, since it uses less digits than its factorization.

21110111032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638763885 (or 2638763881 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21110111032 its reverse (23011101112), we get a palindrome (44121212144).

The spelling of 21110111032 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, thirty-two".