21303144342012 has 48 divisors (see below), whose sum is σ = 55858411929600. Its totient is φ = 6269821745088.

The previous prime is 21303144341987. The next prime is 21303144342017. The reversal of 21303144342012 is 21024344130312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303144342017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2968662012 + ... + 2968669187.

It is an arithmetic number, because the mean of its divisors is an integer number (1163716915200).

Almost surely, 2^{21303144342012} is an apocalyptic number.

It is an amenable number.

21303144342012 is an abundant number, since it is smaller than the sum of its proper divisors (34555267587588).

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

21303144342012 is a wasteful number, since it uses less digits than its factorization.

21303144342012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937331242 (or 5937331240 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21303144342012 its reverse (21024344130312), we get a palindrome (42327488472324).

The spelling of 21303144342012 in words is "twenty-one trillion, three hundred three billion, one hundred forty-four million, three hundred forty-two thousand, twelve".