21211022212222 has 8 divisors (see below), whose sum is σ = 31836785731272. Its totient is φ = 10598760301800.

The previous prime is 21211022212181. The next prime is 21211022212231. The reversal of 21211022212222 is 22221222011212.

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 = 21211022212193 and 21211022212202.

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, 3375398229 + ... + 3375404512.

It is an arithmetic number, because the mean of its divisors is an integer number (3979598216409).

Almost surely, 2^{21211022212222} is an apocalyptic number.

21211022212222 is a deficient number, since it is larger than the sum of its proper divisors (10625763519050).

21211022212222 is a wasteful number, since it uses less digits than its factorization.

21211022212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6750804314.

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

Adding to 21211022212222 its reverse (22221222011212), we get a palindrome (43432244223434).

The spelling of 21211022212222 in words is "twenty-one trillion, two hundred eleven billion, twenty-two million, two hundred twelve thousand, two hundred twenty-two".