21201112112 has 10 divisors (see below), whose sum is σ = 41077154748. Its totient is φ = 10600556048.

The previous prime is 21201112087. The next prime is 21201112139. The reversal of 21201112112 is 21121110212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662534738 + ... + 662534769.

Almost surely, 2^21201112112 is an apocalyptic number.

It is an amenable number.

21201112112 is a deficient number, since it is larger than the sum of its proper divisors (19876042636).

21201112112 is a wasteful number, since it uses less digits than its factorization.

21201112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325069515 (or 1325069509 counting only the distinct ones).

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

Adding to 21201112112 its reverse (21121110212), we get a palindrome (42322222324).

The spelling of 21201112112 in words is "twenty-one billion, two hundred one million, one hundred twelve thousand, one hundred twelve".