21110111196 has 48 divisors (see below), whose sum is σ = 52257730560. Its totient is φ = 6613850880.

The previous prime is 21110111189. The next prime is 21110111203. The reversal of 21110111196 is 69111101112.

It is an interprime number because it is at equal distance from previous prime (21110111189) and next prime (21110111203).

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 335565 + ... + 393476.

It is an arithmetic number, because the mean of its divisors is an integer number (1088702720).

Almost surely, 2^21110111196 is an apocalyptic number.

It is an amenable number.

21110111196 is an abundant number, since it is smaller than the sum of its proper divisors (31147619364).

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

21110111196 is a wasteful number, since it uses less digits than its factorization.

21110111196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729194 (or 729192 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 24.

The spelling of 21110111196 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred ninety-six".