21222330231 has 8 divisors (see below), whose sum is σ = 29785726720. Its totient is φ = 13403576952.

The previous prime is 21222330211. The next prime is 21222330313. The reversal of 21222330231 is 13203322212.

It is a happy number.

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

It is not a de Polignac number, because 21222330231 - 2²¹ = 21220233079 is a prime.

It is a super-2 number, since 2×21222330231² (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 = 21222330198 and 21222330207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222330211) 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, 186160735 + ... + 186160848.

It is an arithmetic number, because the mean of its divisors is an integer number (3723215840).

Almost surely, 2^21222330231 is an apocalyptic number.

21222330231 is a deficient number, since it is larger than the sum of its proper divisors (8563396489).

21222330231 is a wasteful number, since it uses less digits than its factorization.

21222330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372321605.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21222330231 its reverse (13203322212), we get a palindrome (34425652443).

The spelling of 21222330231 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty thousand, two hundred thirty-one".