21231204224323 has 16 divisors (see below), whose sum is σ = 21567916224000. Its totient is φ = 20895569170560.

The previous prime is 21231204224267. The next prime is 21231204224327. The reversal of 21231204224323 is 32342240213212.

It is a cyclic number.

It is not a de Polignac number, because 21231204224323 - 2⁹ = 21231204223811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231204224327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99267403 + ... + 99481051.

It is an arithmetic number, because the mean of its divisors is an integer number (1347994764000).

Almost surely, 2^{21231204224323} is an apocalyptic number.

21231204224323 is a deficient number, since it is larger than the sum of its proper divisors (336711999677).

21231204224323 is a wasteful number, since it uses less digits than its factorization.

21231204224323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216162.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21231204224323 its reverse (32342240213212), we get a palindrome (53573444437535).

The spelling of 21231204224323 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred four million, two hundred twenty-four thousand, three hundred twenty-three".