21311032222 has 8 divisors (see below), whose sum is σ = 32015957616. Its totient is φ = 10639046352.

The previous prime is 21311032189. The next prime is 21311032273. The reversal of 21311032222 is 22223011312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21311032222.

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, 8233263 + ... + 8235850.

It is an arithmetic number, because the mean of its divisors is an integer number (4001994702).

Almost surely, 2^21311032222 is an apocalyptic number.

21311032222 is a deficient number, since it is larger than the sum of its proper divisors (10704925394).

21311032222 is a wasteful number, since it uses less digits than its factorization.

21311032222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16469762.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21311032222 its reverse (22223011312), we get a palindrome (43534043534).

The spelling of 21311032222 in words is "twenty-one billion, three hundred eleven million, thirty-two thousand, two hundred twenty-two".