21321013022 has 4 divisors (see below), whose sum is σ = 31981519536. Its totient is φ = 10660506510.

The previous prime is 21321012989. The next prime is 21321013033. The reversal of 21321013022 is 22031012312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330253254 + ... + 5330253257.

It is an arithmetic number, because the mean of its divisors is an integer number (7995379884).

Almost surely, 2^21321013022 is an apocalyptic number.

21321013022 is a deficient number, since it is larger than the sum of its proper divisors (10660506514).

21321013022 is a wasteful number, since it uses less digits than its factorization.

21321013022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10660506513.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21321013022 its reverse (22031012312), we get a palindrome (43352025334).

The spelling of 21321013022 in words is "twenty-one billion, three hundred twenty-one million, thirteen thousand, twenty-two".