21332534123 has 4 divisors (see below), whose sum is σ = 21373480008. Its totient is φ = 21291588240.

The previous prime is 21332534101. The next prime is 21332534173. The reversal of 21332534123 is 32143523312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21332534123 - 2³⁴ = 4152664939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332534173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20472161 + ... + 20473202.

It is an arithmetic number, because the mean of its divisors is an integer number (5343370002).

Almost surely, 2^21332534123 is an apocalyptic number.

21332534123 is a deficient number, since it is larger than the sum of its proper divisors (40945885).

21332534123 is an equidigital number, since it uses as much as digits as its factorization.

21332534123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40945884.

The product of its digits is 12960, while the sum is 29.

The spelling of 21332534123 in words is "twenty-one billion, three hundred thirty-two million, five hundred thirty-four thousand, one hundred twenty-three".