10001321022 has 128 divisors (see below), whose sum is σ = 25265737728. Its totient is φ = 2563891200.

The previous prime is 10001321021. The next prime is 10001321027. The reversal of 10001321022 is 22012310001.

It is a junction number, because it is equal to n+sod(n) for n = 10001320989 and 10001321007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001321021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15553833 + ... + 15554475.

It is an arithmetic number, because the mean of its divisors is an integer number (197388576).

Almost surely, 2^10001321022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10001321022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12632868864).

10001321022 is an abundant number, since it is smaller than the sum of its proper divisors (15264416706).

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

10001321022 is a wasteful number, since it uses less digits than its factorization.

10001321022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 10001321022 its reverse (22012310001), we get a palindrome (32013631023).

The spelling of 10001321022 in words is "ten billion, one million, three hundred twenty-one thousand, twenty-two".