21201001322 has 16 divisors (see below), whose sum is σ = 32239934280. Its totient is φ = 10454957568.

The previous prime is 21201001307. The next prime is 21201001379. The reversal of 21201001322 is 22310010212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14507961601 + 6693039721 = 120449^2 + 81811^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21201001297 and 21201001306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79343 + ... + 220674.

Almost surely, 2^21201001322 is an apocalyptic number.

21201001322 is a deficient number, since it is larger than the sum of its proper divisors (11038932958).

21201001322 is a wasteful number, since it uses less digits than its factorization.

21201001322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300505.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21201001322 its reverse (22310010212), we get a palindrome (43511011534).

The spelling of 21201001322 in words is "twenty-one billion, two hundred one million, one thousand, three hundred twenty-two".