21242042321012 has 48 divisors (see below), whose sum is σ = 39689256499200. Its totient is φ = 9912774961152.

The previous prime is 21242042320979. The next prime is 21242042321023. The reversal of 21242042321012 is 21012324024212.

It is a happy number.

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, 17398364 + ... + 18579212.

It is an arithmetic number, because the mean of its divisors is an integer number (826859510400).

Almost surely, 2^{21242042321012} is an apocalyptic number.

It is an amenable number.

21242042321012 is a deficient number, since it is larger than the sum of its proper divisors (18447214178188).

21242042321012 is a wasteful number, since it uses less digits than its factorization.

21242042321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183080 (or 1183078 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21242042321012 its reverse (21012324024212), we get a palindrome (42254366345224).

The spelling of 21242042321012 in words is "twenty-one trillion, two hundred forty-two billion, forty-two million, three hundred twenty-one thousand, twelve".