21222130121323 has 8 divisors (see below), whose sum is σ = 21514108947408. Its totient is φ = 20930185476864.

The previous prime is 21222130121317. The next prime is 21222130121371. The reversal of 21222130121323 is 32312103122212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222130121323 - 2⁹ = 21222130120811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222130121303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7293886 + ... + 9779827.

It is an arithmetic number, because the mean of its divisors is an integer number (2689263618426).

Almost surely, 2^{21222130121323} is an apocalyptic number.

21222130121323 is a deficient number, since it is larger than the sum of its proper divisors (291978826085).

21222130121323 is a wasteful number, since it uses less digits than its factorization.

21222130121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17090813.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21222130121323 its reverse (32312103122212), we get a palindrome (53534233243535).

The spelling of 21222130121323 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred thirty million, one hundred twenty-one thousand, three hundred twenty-three".