21101111020222 has 16 divisors (see below), whose sum is σ = 33321602869200. Its totient is φ = 9994045368960.

The previous prime is 21101111020219. The next prime is 21101111020237. The reversal of 21101111020222 is 22202011110112.

It is a junction number, because it is equal to n+sod(n) for n = 21101111020196 and 21101111020205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33510229 + ... + 34134112.

It is an arithmetic number, because the mean of its divisors is an integer number (2082600179325).

Almost surely, 2^{21101111020222} is an apocalyptic number.

21101111020222 is a deficient number, since it is larger than the sum of its proper divisors (12220491848978).

21101111020222 is a wasteful number, since it uses less digits than its factorization.

21101111020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67652571.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21101111020222 its reverse (22202011110112), we get a palindrome (43303122130334).

The spelling of 21101111020222 in words is "twenty-one trillion, one hundred one billion, one hundred eleven million, twenty thousand, two hundred twenty-two".