10221131320 has 64 divisors (see below), whose sum is σ = 24447808800. Its totient is φ = 3834892800.

The previous prime is 10221131317. The next prime is 10221131351. The reversal of 10221131320 is 2313112201.

It is a junction number, because it is equal to n+sod(n) for n = 10221131294 and 10221131303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10182 + ... + 143338.

Almost surely, 2^10221131320 is an apocalyptic number.

10221131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10221131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12223904400).

10221131320 is an abundant number, since it is smaller than the sum of its proper divisors (14226677480).

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

10221131320 is a wasteful number, since it uses less digits than its factorization.

10221131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133288 (or 133284 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10221131320 its reverse (2313112201), we get a palindrome (12534243521).

The spelling of 10221131320 in words is "ten billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty".