21320460535121 has 16 divisors (see below), whose sum is σ = 23614792316928. Its totient is φ = 19086140312400.

The previous prime is 21320460535117. The next prime is 21320460535147. The reversal of 21320460535121 is 12153506402312.

It is a cyclic number.

It is not a de Polignac number, because 21320460535121 - 2² = 21320460535117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21320460535151) 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 15 ways as a sum of consecutive naturals, for example, 15858905 + ... + 17150678.

It is an arithmetic number, because the mean of its divisors is an integer number (1475924519808).

Almost surely, 2^{21320460535121} is an apocalyptic number.

It is an amenable number.

21320460535121 is a deficient number, since it is larger than the sum of its proper divisors (2294331781807).

21320460535121 is a wasteful number, since it uses less digits than its factorization.

21320460535121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33010492.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 21320460535121 its reverse (12153506402312), we get a palindrome (33473966937433).

The spelling of 21320460535121 in words is "twenty-one trillion, three hundred twenty billion, four hundred sixty million, five hundred thirty-five thousand, one hundred twenty-one".