21213141415406 has 64 divisors (see below), whose sum is σ = 34923101028480. Its totient is φ = 9631705628160.

The previous prime is 21213141415387. The next prime is 21213141415421. The reversal of 21213141415406 is 60451414131212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247089920 + ... + 247175756.

It is an arithmetic number, because the mean of its divisors is an integer number (545673453570).

Almost surely, 2^{21213141415406} is an apocalyptic number.

21213141415406 is a deficient number, since it is larger than the sum of its proper divisors (13709959613074).

21213141415406 is a wasteful number, since it uses less digits than its factorization.

21213141415406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88989.

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 21213141415406 its reverse (60451414131212), we get a palindrome (81664555546618).

The spelling of 21213141415406 in words is "twenty-one trillion, two hundred thirteen billion, one hundred forty-one million, four hundred fifteen thousand, four hundred six".