21211102112 has 48 divisors (see below), whose sum is σ = 42205788072. Its totient is φ = 10492339200.

The previous prime is 21211102091. The next prime is 21211102127. The reversal of 21211102112 is 21120111212.

It can be written as a sum of positive squares in 4 ways, for example, as 20875626256 + 335475856 = 144484^2 + 18316^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7875038 + ... + 7877730.

Almost surely, 2^21211102112 is an apocalyptic number.

It is an amenable number.

21211102112 is a deficient number, since it is larger than the sum of its proper divisors (20994685960).

21211102112 is a wasteful number, since it uses less digits than its factorization.

21211102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241 (or 5233 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211102112 its reverse (21120111212), we get a palindrome (42331213324).

The spelling of 21211102112 in words is "twenty-one billion, two hundred eleven million, one hundred two thousand, one hundred twelve".