21155363200316 has 24 divisors (see below), whose sum is σ = 37216197709824. Its totient is φ = 10522165284720.

The previous prime is 21155363200313. The next prime is 21155363200331. The reversal of 21155363200316 is 61300236355112.

21155363200316 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 21155363200316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155363200313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86686121 + ... + 86929823.

It is an arithmetic number, because the mean of its divisors is an integer number (1550674904576).

Almost surely, 2^{21155363200316} is an apocalyptic number.

It is an amenable number.

21155363200316 is a deficient number, since it is larger than the sum of its proper divisors (16060834509508).

21155363200316 is a wasteful number, since it uses less digits than its factorization.

21155363200316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357521 (or 357519 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

Adding to 21155363200316 its reverse (61300236355112), we get a palindrome (82455599555428).

The spelling of 21155363200316 in words is "twenty-one trillion, one hundred fifty-five billion, three hundred sixty-three million, two hundred thousand, three hundred sixteen".