21102223112 has 16 divisors (see below), whose sum is σ = 39570921900. Its totient is φ = 10549977280.

The previous prime is 21102223091. The next prime is 21102223117. The reversal of 21102223112 is 21132220112.

It can be written as a sum of positive squares in 2 ways, for example, as 13601623876 + 7500599236 = 116626^2 + 86606^2 .

It is not an unprimeable number, because it can be changed into a prime (21102223117) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 59939 + ... + 214002.

Almost surely, 2^21102223112 is an apocalyptic number.

It is an amenable number.

21102223112 is a deficient number, since it is larger than the sum of its proper divisors (18468698788).

21102223112 is a wasteful number, since it uses less digits than its factorization.

21102223112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283576 (or 283572 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21102223112 its reverse (21132220112), we get a palindrome (42234443224).

It can be divided in two parts, 2110 and 2223112, that added together give a palindrome (2225222).

The spelling of 21102223112 in words is "twenty-one billion, one hundred two million, two hundred twenty-three thousand, one hundred twelve".