21323402411205 has 16 divisors (see below), whose sum is σ = 34244274510720. Its totient is φ = 11330204401728.

The previous prime is 21323402411161. The next prime is 21323402411237. The reversal of 21323402411205 is 50211420432312.

It is a happy number.

It is not a de Polignac number, because 21323402411205 - 2²⁴ = 21323385633989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2642301097 + ... + 2642309166.

It is an arithmetic number, because the mean of its divisors is an integer number (2140267156920).

Almost surely, 2^{21323402411205} is an apocalyptic number.

It is an amenable number.

21323402411205 is a deficient number, since it is larger than the sum of its proper divisors (12920872099515).

21323402411205 is a wasteful number, since it uses less digits than its factorization.

21323402411205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284610540.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21323402411205 its reverse (50211420432312), we get a palindrome (71534822843517).

The spelling of 21323402411205 in words is "twenty-one trillion, three hundred twenty-three billion, four hundred two million, four hundred eleven thousand, two hundred five".