21311120030232 has 256 divisors, whose sum is σ = 60694883712000. Its totient is φ = 6194554748928.

The previous prime is 21311120030149. The next prime is 21311120030243. The reversal of 21311120030232 is 23203002111312.

It is a junction number, because it is equal to n+sod(n) for n = 21311120030199 and 21311120030208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128515069 + ... + 128680787.

It is an arithmetic number, because the mean of its divisors is an integer number (237089389500).

Almost surely, 2^{21311120030232} 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 21311120030232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30347441856000).

21311120030232 is an abundant number, since it is smaller than the sum of its proper divisors (39383763681768).

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

21311120030232 is a wasteful number, since it uses less digits than its factorization.

21311120030232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166130 (or 166126 counting only the distinct ones).

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

Adding to 21311120030232 its reverse (23203002111312), we get a palindrome (44514122141544).

The spelling of 21311120030232 in words is "twenty-one trillion, three hundred eleven billion, one hundred twenty million, thirty thousand, two hundred thirty-two".