21341021323 has 4 divisors (see below), whose sum is σ = 22076918640. Its totient is φ = 20605124008.

The previous prime is 21341021321. The next prime is 21341021327. The reversal of 21341021323 is 32312014312.

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

It is a cyclic number.

It is not a de Polignac number, because 21341021323 - 2¹ = 21341021321 is a prime.

It is a super-2 number, since 2×21341021323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21341021294 and 21341021303.

It is not an unprimeable number, because it can be changed into a prime (21341021321) 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, 367948615 + ... + 367948672.

It is an arithmetic number, because the mean of its divisors is an integer number (5519229660).

Almost surely, 2^21341021323 is an apocalyptic number.

21341021323 is a deficient number, since it is larger than the sum of its proper divisors (735897317).

21341021323 is an equidigital number, since it uses as much as digits as its factorization.

21341021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735897316.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21341021323 its reverse (32312014312), we get a palindrome (53653035635).

The spelling of 21341021323 in words is "twenty-one billion, three hundred forty-one million, twenty-one thousand, three hundred twenty-three".