21151113384364 has 12 divisors (see below), whose sum is σ = 37017017722384. Its totient is φ = 10574822606544.

The previous prime is 21151113384319. The next prime is 21151113384463. The reversal of 21151113384364 is 46348331115112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21151113384364.

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, 183456579 + ... + 183571834.

Almost surely, 2^{21151113384364} is an apocalyptic number.

It is an amenable number.

21151113384364 is a deficient number, since it is larger than the sum of its proper divisors (15865904338020).

21151113384364 is a wasteful number, since it uses less digits than its factorization.

21151113384364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367042824 (or 367042822 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

Adding to 21151113384364 its reverse (46348331115112), we get a palindrome (67499444499476).

The spelling of 21151113384364 in words is "twenty-one trillion, one hundred fifty-one billion, one hundred thirteen million, three hundred eighty-four thousand, three hundred sixty-four".