21321301040342 has 16 divisors (see below), whose sum is σ = 32756546672640. Its totient is φ = 10403759483688.

The previous prime is 21321301040341. The next prime is 21321301040423. The reversal of 21321301040342 is 24304010312312.

It is a super-2 number, since 2×21321301040342² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321301040341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326800742 + ... + 326865977.

It is an arithmetic number, because the mean of its divisors is an integer number (2047284167040).

Almost surely, 2^{21321301040342} is an apocalyptic number.

21321301040342 is a deficient number, since it is larger than the sum of its proper divisors (11435245632298).

21321301040342 is a wasteful number, since it uses less digits than its factorization.

21321301040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653667115.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21321301040342 its reverse (24304010312312), we get a palindrome (45625311352654).

The spelling of 21321301040342 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred one million, forty thousand, three hundred forty-two".