21332231023 has 4 divisors (see below), whose sum is σ = 22587068160. Its totient is φ = 20077393888.

The previous prime is 21332230993. The next prime is 21332231027. The reversal of 21332231023 is 32013223312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332231023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332230985 and 21332231003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332231027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627418543 + ... + 627418576.

It is an arithmetic number, because the mean of its divisors is an integer number (5646767040).

Almost surely, 2^21332231023 is an apocalyptic number.

21332231023 is a deficient number, since it is larger than the sum of its proper divisors (1254837137).

21332231023 is a wasteful number, since it uses less digits than its factorization.

21332231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254837136.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21332231023 its reverse (32013223312), we get a palindrome (53345454335).

The spelling of 21332231023 in words is "twenty-one billion, three hundred thirty-two million, two hundred thirty-one thousand, twenty-three".