21002222120222 has 32 divisors (see below), whose sum is σ = 36071658694080. Its totient is φ = 8983994019840.

The previous prime is 21002222120207. The next prime is 21002222120273. The reversal of 21002222120222 is 22202122220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002222120194 and 21002222120203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64210118 + ... + 64536374.

It is an arithmetic number, because the mean of its divisors is an integer number (1127239334190).

Almost surely, 2^{21002222120222} is an apocalyptic number.

21002222120222 is a deficient number, since it is larger than the sum of its proper divisors (15069436573858).

21002222120222 is a wasteful number, since it uses less digits than its factorization.

21002222120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334916.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21002222120222 its reverse (22202122220012), we get a palindrome (43204344340234).

The spelling of 21002222120222 in words is "twenty-one trillion, two billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty-two".