21211222120222 has 8 divisors (see below), whose sum is σ = 32556759533496. Its totient is φ = 10358968942392.

The previous prime is 21211222120211. The next prime is 21211222120237. The reversal of 21211222120222 is 22202122211212.

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 = 21211222120193 and 21211222120202.

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, 123321058753 + ... + 123321058924.

It is an arithmetic number, because the mean of its divisors is an integer number (4069594941687).

Almost surely, 2^{21211222120222} is an apocalyptic number.

21211222120222 is a deficient number, since it is larger than the sum of its proper divisors (11345537413274).

21211222120222 is a wasteful number, since it uses less digits than its factorization.

21211222120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246642117722.

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

Adding to 21211222120222 its reverse (22202122211212), we get a palindrome (43413344331434).

The spelling of 21211222120222 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty-two".