21013243102342 has 8 divisors (see below), whose sum is σ = 31524238182096. Its totient is φ = 10505163708312.

The previous prime is 21013243102303. The next prime is 21013243102349. The reversal of 21013243102342 is 24320134231012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21013243102342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013243102349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728903413 + ... + 728932240.

It is an arithmetic number, because the mean of its divisors is an integer number (3940529772762).

Almost surely, 2^{21013243102342} is an apocalyptic number.

21013243102342 is a deficient number, since it is larger than the sum of its proper divisors (10510995079754).

21013243102342 is a wasteful number, since it uses less digits than its factorization.

21013243102342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457842862.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21013243102342 its reverse (24320134231012), we get a palindrome (45333377333354).

The spelling of 21013243102342 in words is "twenty-one trillion, thirteen billion, two hundred forty-three million, one hundred two thousand, three hundred forty-two".