21342222243121 has 8 divisors (see below), whose sum is σ = 22988938012544. Its totient is φ = 19696221668880.

The previous prime is 21342222243109. The next prime is 21342222243193. The reversal of 21342222243121 is 12134222224312.

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

It is a cyclic number.

It is not a de Polignac number, because 21342222243121 - 2¹¹ = 21342222241073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342222243101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178736811 + ... + 178856176.

It is an arithmetic number, because the mean of its divisors is an integer number (2873617251568).

Almost surely, 2^{21342222243121} is an apocalyptic number.

It is an amenable number.

21342222243121 is a deficient number, since it is larger than the sum of its proper divisors (1646715769423).

21342222243121 is a wasteful number, since it uses less digits than its factorization.

21342222243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357597591.

The product of its digits is 18432, while the sum is 31.

Adding to 21342222243121 its reverse (12134222224312), we get a palindrome (33476444467433).

The spelling of 21342222243121 in words is "twenty-one trillion, three hundred forty-two billion, two hundred twenty-two million, two hundred forty-three thousand, one hundred twenty-one".