21110032111 has 8 divisors (see below), whose sum is σ = 24265207584. Its totient is φ = 17989720800.

The previous prime is 21110032079. The next prime is 21110032121. The reversal of 21110032111 is 11123001112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21110032111 - 2⁵ = 21110032079 is a prime.

It is a super-2 number, since 2×21110032111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110032091 and 21110032100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110032121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8714740 + ... + 8717161.

It is an arithmetic number, because the mean of its divisors is an integer number (3033150948).

Almost surely, 2^21110032111 is an apocalyptic number.

21110032111 is a deficient number, since it is larger than the sum of its proper divisors (3155175473).

21110032111 is a wasteful number, since it uses less digits than its factorization.

21110032111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432081.

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

Adding to 21110032111 its reverse (11123001112), we get a palindrome (32233033223).

The spelling of 21110032111 in words is "twenty-one billion, one hundred ten million, thirty-two thousand, one hundred eleven".