21120202112 has 32 divisors (see below), whose sum is σ = 42492016800. Its totient is φ = 10455539200.

The previous prime is 21120202097. The next prime is 21120202139.

21120202112 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 803912 + ... + 829767.

It is an arithmetic number, because the mean of its divisors is an integer number (1327875525).

Almost surely, 2^21120202112 is an apocalyptic number.

It is an amenable number.

21120202112 is an abundant number, since it is smaller than the sum of its proper divisors (21371814688).

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

21120202112 is a wasteful number, since it uses less digits than its factorization.

21120202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633794 (or 1633782 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The spelling of 21120202112 in words is "twenty-one billion, one hundred twenty million, two hundred two thousand, one hundred twelve".