21332023231 has 8 divisors (see below), whose sum is σ = 21432950784. Its totient is φ = 21231143160.

The previous prime is 21332023199. The next prime is 21332023313. The reversal of 21332023231 is 13232023312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21332023231 - 2⁵ = 21332023199 is a prime.

It is a super-2 number, since 2×21332023231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332023931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1157370 + ... + 1175656.

It is an arithmetic number, because the mean of its divisors is an integer number (2679118848).

Almost surely, 2^21332023231 is an apocalyptic number.

21332023231 is a deficient number, since it is larger than the sum of its proper divisors (100927553).

21332023231 is a wasteful number, since it uses less digits than its factorization.

21332023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23741.

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

Adding to 21332023231 its reverse (13232023312), we get a palindrome (34564046543).

The spelling of 21332023231 in words is "twenty-one billion, three hundred thirty-two million, twenty-three thousand, two hundred thirty-one".