21211120121222 has 8 divisors (see below), whose sum is σ = 31819244219400. Its totient is φ = 10604705381424.

The previous prime is 21211120121207. The next prime is 21211120121273. The reversal of 21211120121222 is 22212102111212.

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 = 21211120121194 and 21211120121203.

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, 427308572 + ... + 427358207.

It is an arithmetic number, because the mean of its divisors is an integer number (3977405527425).

Almost surely, 2^{21211120121222} is an apocalyptic number.

21211120121222 is a deficient number, since it is larger than the sum of its proper divisors (10608124098178).

21211120121222 is a wasteful number, since it uses less digits than its factorization.

21211120121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854679190.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21211120121222 its reverse (22212102111212), we get a palindrome (43423222232434).

The spelling of 21211120121222 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-two".