21021122012222 has 8 divisors (see below), whose sum is σ = 31531752683256. Its totient is φ = 10510537784472.

The previous prime is 21021122012173. The next prime is 21021122012227. The reversal of 21021122012222 is 22221022112012.

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 = 21021122012194 and 21021122012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021122012227) 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, 10456313 + ... + 12303524.

It is an arithmetic number, because the mean of its divisors is an integer number (3941469085407).

Almost surely, 2^{21021122012222} is an apocalyptic number.

21021122012222 is a deficient number, since it is larger than the sum of its proper divisors (10510630671034).

21021122012222 is a wasteful number, since it uses less digits than its factorization.

21021122012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23221642.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21021122012222 its reverse (22221022112012), we get a palindrome (43242144124234).

The spelling of 21021122012222 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, twelve thousand, two hundred twenty-two".