21242203213112 has 48 divisors (see below), whose sum is σ = 48346274414160. Its totient is φ = 8707983922176.

The previous prime is 21242203213069. The next prime is 21242203213157. The reversal of 21242203213112 is 21131230224212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178019113 + ... + 1178037144.

It is an arithmetic number, because the mean of its divisors is an integer number (1007214050295).

Almost surely, 2^{21242203213112} is an apocalyptic number.

It is an amenable number.

21242203213112 is an abundant number, since it is smaller than the sum of its proper divisors (27104071201048).

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

21242203213112 is a wasteful number, since it uses less digits than its factorization.

21242203213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356056300 (or 2356056289 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21242203213112 its reverse (21131230224212), we get a palindrome (42373433437324).

The spelling of 21242203213112 in words is "twenty-one trillion, two hundred forty-two billion, two hundred three million, two hundred thirteen thousand, one hundred twelve".