20321101112 has 64 divisors (see below), whose sum is σ = 41658624000. Its totient is φ = 9236582784.

The previous prime is 20321101111. The next prime is 20321101117. The reversal of 20321101112 is 21110112302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321101111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3439553 + ... + 3445455.

It is an arithmetic number, because the mean of its divisors is an integer number (650916000).

Almost surely, 2^20321101112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20321101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20829312000).

20321101112 is an abundant number, since it is smaller than the sum of its proper divisors (21337522888).

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

20321101112 is a wasteful number, since it uses less digits than its factorization.

20321101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420 (or 6416 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20321101112 its reverse (21110112302), we get a palindrome (41431213414).

The spelling of 20321101112 in words is "twenty billion, three hundred twenty-one million, one hundred one thousand, one hundred twelve".