20331122121232 has 80 divisors (see below), whose sum is σ = 43849860318208. Its totient is φ = 9068507435520.

The previous prime is 20331122121229. The next prime is 20331122121239. The reversal of 20331122121232 is 23212122113302.

It is a junction number, because it is equal to n+sod(n) for n = 20331122121197 and 20331122121206.

It is not an unprimeable number, because it can be changed into a prime (20331122121239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2575573 + ... + 6877195.

Almost surely, 2^{20331122121232} 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 20331122121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21924930159104).

20331122121232 is an abundant number, since it is smaller than the sum of its proper divisors (23518738196976).

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

20331122121232 is a wasteful number, since it uses less digits than its factorization.

20331122121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302408 (or 4302402 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20331122121232 its reverse (23212122113302), we get a palindrome (43543244234534).

The spelling of 20331122121232 in words is "twenty trillion, three hundred thirty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred thirty-two".