21522401130145 has 16 divisors (see below), whose sum is σ = 26441616719232. Its totient is φ = 16808524911360.

The previous prime is 21522401130137. The next prime is 21522401130149. The reversal of 21522401130145 is 54103110422512.

It is not a de Polignac number, because 21522401130145 - 2³ = 21522401130137 is a prime.

It is a super-3 number, since 3×21522401130145³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21522401130149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26320261 + ... + 27125650.

It is an arithmetic number, because the mean of its divisors is an integer number (1652601044952).

Almost surely, 2^{21522401130145} is an apocalyptic number.

It is an amenable number.

21522401130145 is a deficient number, since it is larger than the sum of its proper divisors (4919215589087).

21522401130145 is a wasteful number, since it uses less digits than its factorization.

21522401130145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53447832.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 21522401130145 its reverse (54103110422512), we get a palindrome (75625511552657).

The spelling of 21522401130145 in words is "twenty-one trillion, five hundred twenty-two billion, four hundred one million, one hundred thirty thousand, one hundred forty-five".