21243310022044 has 24 divisors (see below), whose sum is σ = 40864993335936. Its totient is φ = 9582339702000.

The previous prime is 21243310022027. The next prime is 21243310022057. The reversal of 21243310022044 is 44022001334212.

It is a congruent number.

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, 1842751872 + ... + 1842763399.

It is an arithmetic number, because the mean of its divisors is an integer number (1702708055664).

Almost surely, 2^{21243310022044} is an apocalyptic number.

It is an amenable number.

21243310022044 is a deficient number, since it is larger than the sum of its proper divisors (19621683313892).

21243310022044 is a wasteful number, since it uses less digits than its factorization.

21243310022044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685515417 (or 3685515415 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21243310022044 its reverse (44022001334212), we get a palindrome (65265311356256).

The spelling of 21243310022044 in words is "twenty-one trillion, two hundred forty-three billion, three hundred ten million, twenty-two thousand, forty-four".