21220211112 has 32 divisors (see below), whose sum is σ = 53078088480. Its totient is φ = 7069728960.

The previous prime is 21220211099. The next prime is 21220211141. The reversal of 21220211112 is 21111202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220211091 and 21220211100.

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, 182314 + ... + 275097.

It is an arithmetic number, because the mean of its divisors is an integer number (1658690265).

Almost surely, 2^21220211112 is an apocalyptic number.

It is an amenable number.

21220211112 is an abundant number, since it is smaller than the sum of its proper divisors (31857877368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220211112 is a wasteful number, since it uses less digits than its factorization.

21220211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459353 (or 459349 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21220211112 its reverse (21111202212), we get a palindrome (42331413324).

The spelling of 21220211112 in words is "twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred twelve".