21332224423 has 2 divisors, whose sum is σ = 21332224424. Its totient is φ = 21332224422.

The previous prime is 21332224387. The next prime is 21332224447. The reversal of 21332224423 is 32442223312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21332224423 - 2²⁵ = 21298669991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21332224391 and 21332224400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332264423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666112211 + 10666112212.

It is an arithmetic number, because the mean of its divisors is an integer number (10666112212).

Almost surely, 2^21332224423 is an apocalyptic number.

21332224423 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332224423 is an equidigital number, since it uses as much as digits as its factorization.

21332224423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 28.

Adding to 21332224423 its reverse (32442223312), we get a palindrome (53774447735).

The spelling of 21332224423 in words is "twenty-one billion, three hundred thirty-two million, two hundred twenty-four thousand, four hundred twenty-three".