21311303230032 has 160 divisors (see below), whose sum is σ = 57406455216000. Its totient is φ = 6806579060736.

The previous prime is 21311303229991. The next prime is 21311303230081. The reversal of 21311303230032 is 23003230311312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21311303229984 and 21311303230011.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 989877444 + ... + 989898972.

It is an arithmetic number, because the mean of its divisors is an integer number (358790345100).

Almost surely, 2^{21311303230032} 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 21311303230032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28703227608000).

21311303230032 is an abundant number, since it is smaller than the sum of its proper divisors (36095151985968).

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

21311303230032 is a wasteful number, since it uses less digits than its factorization.

21311303230032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30685 (or 30679 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21311303230032 its reverse (23003230311312), we get a palindrome (44314533541344).

The spelling of 21311303230032 in words is "twenty-one trillion, three hundred eleven billion, three hundred three million, two hundred thirty thousand, thirty-two".