21213141415506 has 16 divisors (see below), whose sum is σ = 47140314256800. Its totient is φ = 7071047138484.

The previous prime is 21213141415483. The next prime is 21213141415559. The reversal of 21213141415506 is 60551414131212.

21213141415506 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 3 + 1 + 4 + 141 + 5 + 506 = 666.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 196417976016 + ... + 196417976123.

It is an arithmetic number, because the mean of its divisors is an integer number (2946269641050).

Almost surely, 2^{21213141415506} is an apocalyptic number.

21213141415506 is an abundant number, since it is smaller than the sum of its proper divisors (25927172841294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21213141415506 is a wasteful number, since it uses less digits than its factorization.

21213141415506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392835952150 (or 392835952144 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

Adding to 21213141415506 its reverse (60551414131212), we get a palindrome (81764555546718).

The spelling of 21213141415506 in words is "twenty-one trillion, two hundred thirteen billion, one hundred forty-one million, four hundred fifteen thousand, five hundred six".