21233332231 has 8 divisors (see below), whose sum is σ = 23207589504. Its totient is φ = 19339656960.

The previous prime is 21233332223. The next prime is 21233332243. The reversal of 21233332231 is 13223333212.

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

It is not a de Polignac number, because 21233332231 - 2³ = 21233332223 is a prime.

It is a super-2 number, since 2×21233332231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21233332196 and 21233332205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233332291) 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 7 ways as a sum of consecutive naturals, for example, 20144950 + ... + 20146003.

It is an arithmetic number, because the mean of its divisors is an integer number (2900948688).

Almost surely, 2^21233332231 is an apocalyptic number.

21233332231 is a deficient number, since it is larger than the sum of its proper divisors (1974257273).

21233332231 is a wasteful number, since it uses less digits than its factorization.

21233332231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40291001.

The product of its digits is 3888, while the sum is 25.

Adding to 21233332231 its reverse (13223333212), we get a palindrome (34456665443).

The spelling of 21233332231 in words is "twenty-one billion, two hundred thirty-three million, three hundred thirty-two thousand, two hundred thirty-one".