21211222022 has 8 divisors (see below), whose sum is σ = 31817713872. Its totient is φ = 10605317400.

The previous prime is 21211221991. The next prime is 21211222051. The reversal of 21211222022 is 22022211212.

It is a happy number.

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

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, 41354 + ... + 210077.

It is an arithmetic number, because the mean of its divisors is an integer number (3977214234).

Almost surely, 2^21211222022 is an apocalyptic number.

21211222022 is a deficient number, since it is larger than the sum of its proper divisors (10606491850).

21211222022 is a wasteful number, since it uses less digits than its factorization.

21211222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293614.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21211222022 its reverse (22022211212), we get a palindrome (43233433234).

The spelling of 21211222022 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, twenty-two".