21321244142534 has 32 divisors (see below), whose sum is σ = 37811602870272. Its totient is φ = 8823730212000.

The previous prime is 21321244142491. The next prime is 21321244142551. The reversal of 21321244142534 is 43524144212312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53083322 + ... + 53483469.

It is an arithmetic number, because the mean of its divisors is an integer number (1181612589696).

Almost surely, 2^{21321244142534} is an apocalyptic number.

21321244142534 is a deficient number, since it is larger than the sum of its proper divisors (16490358727738).

21321244142534 is a wasteful number, since it uses less digits than its factorization.

21321244142534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106567292.

The product of its digits is 184320, while the sum is 38.

Adding to 21321244142534 its reverse (43524144212312), we get a palindrome (64845388354846).

The spelling of 21321244142534 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred forty-four million, one hundred forty-two thousand, five hundred thirty-four".