21312010222 has 8 divisors (see below), whose sum is σ = 32648186016. Its totient is φ = 10429281552.

The previous prime is 21312010219. The next prime is 21312010277. The reversal of 21312010222 is 22201021312.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21312010196 and 21312010205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113361663 + ... + 113361850.

It is an arithmetic number, because the mean of its divisors is an integer number (4081023252).

Almost surely, 2^21312010222 is an apocalyptic number.

21312010222 is a deficient number, since it is larger than the sum of its proper divisors (11336175794).

21312010222 is a wasteful number, since it uses less digits than its factorization.

21312010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226723562.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21312010222 its reverse (22201021312), we get a palindrome (43513031534).

The spelling of 21312010222 in words is "twenty-one billion, three hundred twelve million, ten thousand, two hundred twenty-two".