21221322301 has 4 divisors (see below), whose sum is σ = 22143988512. Its totient is φ = 20298656092.

The previous prime is 21221322263. The next prime is 21221322329. The reversal of 21221322301 is 10322312212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21221322301 - 2²¹ = 21219225149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221322341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461333071 + ... + 461333116.

It is an arithmetic number, because the mean of its divisors is an integer number (5535997128).

Almost surely, 2^21221322301 is an apocalyptic number.

It is an amenable number.

21221322301 is a deficient number, since it is larger than the sum of its proper divisors (922666211).

21221322301 is an equidigital number, since it uses as much as digits as its factorization.

21221322301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922666210.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21221322301 its reverse (10322312212), we get a palindrome (31543634513).

The spelling of 21221322301 in words is "twenty-one billion, two hundred twenty-one million, three hundred twenty-two thousand, three hundred one".