21242444203012 has 24 divisors (see below), whose sum is σ = 38050175217600. Its totient is φ = 10373761732320.

The previous prime is 21242444203009. The next prime is 21242444203151. The reversal of 21242444203012 is 21030244424212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349489887 + ... + 349550662.

It is an arithmetic number, because the mean of its divisors is an integer number (1585423967400).

Almost surely, 2^{21242444203012} is an apocalyptic number.

It is an amenable number.

21242444203012 is a deficient number, since it is larger than the sum of its proper divisors (16807731014588).

21242444203012 is a wasteful number, since it uses less digits than its factorization.

21242444203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699040731 (or 699040729 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21242444203012 its reverse (21030244424212), we get a palindrome (42272688627224).

The spelling of 21242444203012 in words is "twenty-one trillion, two hundred forty-two billion, four hundred forty-four million, two hundred three thousand, twelve".