21022212211222 has 8 divisors (see below), whose sum is σ = 31533414592896. Its totient is φ = 10511074013592.

The previous prime is 21022212211199. The next prime is 21022212211229. The reversal of 21022212211222 is 22211221222012.

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 = 21022212211193 and 21022212211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022212211229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15218653 + ... + 16542424.

It is an arithmetic number, because the mean of its divisors is an integer number (3941676824112).

Almost surely, 2^{21022212211222} is an apocalyptic number.

21022212211222 is a deficient number, since it is larger than the sum of its proper divisors (10511202381674).

21022212211222 is a wasteful number, since it uses less digits than its factorization.

21022212211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32092022.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21022212211222 its reverse (22211221222012), we get a palindrome (43233433433234).

The spelling of 21022212211222 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty-two".