21231023222 has 8 divisors (see below), whose sum is σ = 31873921416. Its totient is φ = 10606382752.

The previous prime is 21231023201. The next prime is 21231023237. The reversal of 21231023222 is 22232013212.

It is a happy number.

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

It is a super-2 number, since 2×21231023222² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21231023194 and 21231023203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4561523 + ... + 4566174.

It is an arithmetic number, because the mean of its divisors is an integer number (3984240177).

Almost surely, 2^21231023222 is an apocalyptic number.

21231023222 is a deficient number, since it is larger than the sum of its proper divisors (10642898194).

21231023222 is a wasteful number, since it uses less digits than its factorization.

21231023222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9128862.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21231023222 its reverse (22232013212), we get a palindrome (43463036434).

It can be divided in two parts, 212310 and 23222, that added together give a palindrome (235532).

The spelling of 21231023222 in words is "twenty-one billion, two hundred thirty-one million, twenty-three thousand, two hundred twenty-two".