21150216162316 has 12 divisors (see below), whose sum is σ = 37013845273888. Its totient is φ = 10574831798352.

The previous prime is 21150216162253. The next prime is 21150216162331. The reversal of 21150216162316 is 61326161205112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68898411 + ... + 69204706.

Almost surely, 2^{21150216162316} is an apocalyptic number.

It is an amenable number.

21150216162316 is a deficient number, since it is larger than the sum of its proper divisors (15863629111572).

21150216162316 is a wasteful number, since it uses less digits than its factorization.

21150216162316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138141408 (or 138141406 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

Adding to 21150216162316 its reverse (61326161205112), we get a palindrome (82476377367428).

The spelling of 21150216162316 in words is "twenty-one trillion, one hundred fifty billion, two hundred sixteen million, one hundred sixty-two thousand, three hundred sixteen".