21160316123522 has 8 divisors (see below), whose sum is σ = 31848803449596. Its totient is φ = 10544048306992.

The previous prime is 21160316123521. The next prime is 21160316123539. The reversal of 21160316123522 is 22532161306112.

It can be written as a sum of positive squares in 2 ways, for example, as 16746665568361 + 4413650555161 = 4092269^2 + 2100869^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21160316123521) 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 3 ways as a sum of consecutive naturals, for example, 18054876653 + ... + 18054877824.

Almost surely, 2^{21160316123522} is an apocalyptic number.

21160316123522 is a deficient number, since it is larger than the sum of its proper divisors (10688487326074).

21160316123522 is a wasteful number, since it uses less digits than its factorization.

21160316123522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36109754772.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 21160316123522 its reverse (22532161306112), we get a palindrome (43692477429634).

The spelling of 21160316123522 in words is "twenty-one trillion, one hundred sixty billion, three hundred sixteen million, one hundred twenty-three thousand, five hundred twenty-two".