21231122110 has 16 divisors (see below), whose sum is σ = 41690203632. Its totient is φ = 7720408000.

The previous prime is 21231122071. The next prime is 21231122137. The reversal of 21231122110 is 1122113212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96504991 + ... + 96505210.

It is an arithmetic number, because the mean of its divisors is an integer number (2605637727).

Almost surely, 2^21231122110 is an apocalyptic number.

21231122110 is a deficient number, since it is larger than the sum of its proper divisors (20459081522).

21231122110 is a wasteful number, since it uses less digits than its factorization.

21231122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193010219.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21231122110 its reverse (1122113212), we get a palindrome (22353235322).

It can be divided in two parts, 21231 and 122110, that added together give a palindrome (143341).

The spelling of 21231122110 in words is "twenty-one billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred ten".