21323311301 has 4 divisors (see below), whose sum is σ = 21323887500. Its totient is φ = 21322735104.

The previous prime is 21323311297. The next prime is 21323311309. The reversal of 21323311301 is 10311332312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19607280676 + 1716030625 = 140026^2 + 41425^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323311301 - 2² = 21323311297 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 (21323311309) 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, 228476 + ... + 307973.

It is an arithmetic number, because the mean of its divisors is an integer number (5330971875).

Almost surely, 2^21323311301 is an apocalyptic number.

It is an amenable number.

21323311301 is a deficient number, since it is larger than the sum of its proper divisors (576199).

21323311301 is an equidigital number, since it uses as much as digits as its factorization.

21323311301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576198.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21323311301 its reverse (10311332312), we get a palindrome (31634643613).

The spelling of 21323311301 in words is "twenty-one billion, three hundred twenty-three million, three hundred eleven thousand, three hundred one".