21020113332232 has 128 divisors (see below), whose sum is σ = 47482283520000. Its totient is φ = 8522163311616.

The previous prime is 21020113332223. The next prime is 21020113332233. The reversal of 21020113332232 is 23223331102012.

It is a junction number, because it is equal to n+sod(n) for n = 21020113332197 and 21020113332206.

It is not an unprimeable number, because it can be changed into a prime (21020113332233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2410835569 + ... + 2410844287.

It is an arithmetic number, because the mean of its divisors is an integer number (370955340000).

Almost surely, 2^{21020113332232} 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 21020113332232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23741141760000).

21020113332232 is an abundant number, since it is smaller than the sum of its proper divisors (26462170187768).

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

21020113332232 is a wasteful number, since it uses less digits than its factorization.

21020113332232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11763 (or 11759 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21020113332232 its reverse (23223331102012), we get a palindrome (44243444434244).

The spelling of 21020113332232 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, three hundred thirty-two thousand, two hundred thirty-two".