21201122322 has 48 divisors (see below), whose sum is σ = 47198967192. Its totient is φ = 6872878080.

The previous prime is 21201122303. The next prime is 21201122329. The reversal of 21201122322 is 22322110212.

21201122322 is a `hidden beast` number, since 21 + 201 + 122 + 322 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20252420721 + 948701601 = 142311^2 + 30801^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21201122295 and 21201122304.

It is not an unprimeable number, because it can be changed into a prime (21201122329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1763572 + ... + 1775552.

Almost surely, 2^21201122322 is an apocalyptic number.

21201122322 is an abundant number, since it is smaller than the sum of its proper divisors (25997844870).

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

21201122322 is a wasteful number, since it uses less digits than its factorization.

21201122322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14683 (or 14680 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21201122322 its reverse (22322110212), we get a palindrome (43523232534).

The spelling of 21201122322 in words is "twenty-one billion, two hundred one million, one hundred twenty-two thousand, three hundred twenty-two".