21146229760161 has 16 divisors (see below), whose sum is σ = 31000342560768. Its totient is φ = 12714984248400.

The previous prime is 21146229760109. The next prime is 21146229760181. The reversal of 21146229760161 is 16106792264112.

It is not a de Polignac number, because 21146229760161 - 2²³ = 21146221371553 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21146229760161.

It is not an unprimeable number, because it can be changed into a prime (21146229760181) 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, 2522810145 + ... + 2522818526.

It is an arithmetic number, because the mean of its divisors is an integer number (1937521410048).

Almost surely, 2^{21146229760161} is an apocalyptic number.

It is an amenable number.

21146229760161 is a deficient number, since it is larger than the sum of its proper divisors (9854112800607).

21146229760161 is a wasteful number, since it uses less digits than its factorization.

21146229760161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045628812.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 21146229760161 in words is "twenty-one trillion, one hundred forty-six billion, two hundred twenty-nine million, seven hundred sixty thousand, one hundred sixty-one".