21220102111112 has 32 divisors (see below), whose sum is σ = 40245527338200. Its totient is φ = 10488025388544.

The previous prime is 21220102111111. The next prime is 21220102111121. The reversal of 21220102111112 is 21111120102212.

It can be written as a sum of positive squares in 4 ways, for example, as 8092625320516 + 13127476790596 = 2844754^2 + 3623186^2 .

It is not an unprimeable number, because it can be changed into a prime (21220102111111) by changing a digit.

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, 1334003 + ... + 6649794.

Almost surely, 2^{21220102111112} is an apocalyptic number.

It is an amenable number.

21220102111112 is a deficient number, since it is larger than the sum of its proper divisors (19025425227088).

21220102111112 is a wasteful number, since it uses less digits than its factorization.

21220102111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987625 (or 7987621 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21220102111112 its reverse (21111120102212), we get a palindrome (42331222213324).

The spelling of 21220102111112 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, one hundred eleven thousand, one hundred twelve".