21213316541164 has 12 divisors (see below), whose sum is σ = 40498149760488. Its totient is φ = 9642416609600.

The previous prime is 21213316541107. The next prime is 21213316541237. The reversal of 21213316541164 is 46114561331212.

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, 241060415197 + ... + 241060415284.

It is an arithmetic number, because the mean of its divisors is an integer number (3374845813374).

Almost surely, 2^{21213316541164} is an apocalyptic number.

It is an amenable number.

21213316541164 is a deficient number, since it is larger than the sum of its proper divisors (19284833219324).

21213316541164 is a wasteful number, since it uses less digits than its factorization.

21213316541164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482120830496 (or 482120830494 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

Adding to 21213316541164 its reverse (46114561331212), we get a palindrome (67327877872376).

The spelling of 21213316541164 in words is "twenty-one trillion, two hundred thirteen billion, three hundred sixteen million, five hundred forty-one thousand, one hundred sixty-four".