21433525123 has 2 divisors, whose sum is σ = 21433525124. Its totient is φ = 21433525122.

The previous prime is 21433525093. The next prime is 21433525129. The reversal of 21433525123 is 32152533412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21433525123 - 2⁹ = 21433524611 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433525129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716762561 + 10716762562.

It is an arithmetic number, because the mean of its divisors is an integer number (10716762562).

Almost surely, 2^21433525123 is an apocalyptic number.

21433525123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433525123 is an equidigital number, since it uses as much as digits as its factorization.

21433525123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 31.

The spelling of 21433525123 in words is "twenty-one billion, four hundred thirty-three million, five hundred twenty-five thousand, one hundred twenty-three".