21113223132 has 24 divisors (see below), whose sum is σ = 50071798672. Its totient is φ = 6922368000.

The previous prime is 21113223121. The next prime is 21113223137. The reversal of 21113223132 is 23132231112.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21113223099 and 21113223108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113223137) 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, 14420869 + ... + 14422332.

Almost surely, 2^21113223132 is an apocalyptic number.

It is an amenable number.

21113223132 is an abundant number, since it is smaller than the sum of its proper divisors (28958575540).

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

21113223132 is a wasteful number, since it uses less digits than its factorization.

21113223132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28843269 (or 28843267 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 21113223132 its reverse (23132231112), we get a palindrome (44245454244).

The spelling of 21113223132 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty-three thousand, one hundred thirty-two".