21133020322 has 4 divisors (see below), whose sum is σ = 31699530486. Its totient is φ = 10566510160.

The previous prime is 21133020301. The next prime is 21133020329. The reversal of 21133020322 is 22302033112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21132727641 + 292681 = 145371^2 + 541^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21133020322.

It is not an unprimeable number, because it can be changed into a prime (21133020329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5283255079 + ... + 5283255082.

Almost surely, 2^21133020322 is an apocalyptic number.

21133020322 is a deficient number, since it is larger than the sum of its proper divisors (10566510164).

21133020322 is a wasteful number, since it uses less digits than its factorization.

21133020322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10566510163.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21133020322 its reverse (22302033112), we get a palindrome (43435053434).

The spelling of 21133020322 in words is "twenty-one billion, one hundred thirty-three million, twenty thousand, three hundred twenty-two".