21111196 has 6 divisors (see below), whose sum is σ = 36944600. Its totient is φ = 10555596.

The previous prime is 21111191. The next prime is 21111197. The reversal of 21111196 is 69111112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2638896 + ... + 2638903.

Almost surely, 2^21111196 is an apocalyptic number.

It is an amenable number.

21111196 is a deficient number, since it is larger than the sum of its proper divisors (15833404).

21111196 is a wasteful number, since it uses less digits than its factorization.

21111196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277803 (or 5277801 counting only the distinct ones).

The product of its digits is 108, while the sum is 22.

The square root of 21111196 is about 4594.6921550850. The cubic root of 21111196 is about 276.3785151715.

The spelling of 21111196 in words is "twenty-one million, one hundred eleven thousand, one hundred ninety-six".