21232023311 has 8 divisors (see below), whose sum is σ = 21349819920. Its totient is φ = 21114445248.

The previous prime is 21232023283. The next prime is 21232023343. The reversal of 21232023311 is 11332023212.

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

It is a cyclic number.

It is not a de Polignac number, because 21232023311 - 2¹⁸ = 21231761167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232023361) 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, 142160 + ... + 250346.

It is an arithmetic number, because the mean of its divisors is an integer number (2668727490).

Almost surely, 2^21232023311 is an apocalyptic number.

21232023311 is a deficient number, since it is larger than the sum of its proper divisors (117796609).

21232023311 is a wasteful number, since it uses less digits than its factorization.

21232023311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109273.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21232023311 its reverse (11332023212), we get a palindrome (32564046523).

Subtracting from 21232023311 its reverse (11332023212), we obtain a palindrome (9900000099).

The spelling of 21232023311 in words is "twenty-one billion, two hundred thirty-two million, twenty-three thousand, three hundred eleven".