21121333316562 has 32 divisors (see below), whose sum is σ = 43040071493568. Its totient is φ = 6907545934016.

The previous prime is 21121333316417. The next prime is 21121333316581. The reversal of 21121333316562 is 26561333312112.

It is a super-2 number, since 2×21121333316562² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121333316562.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50446693 + ... + 50863655.

It is an arithmetic number, because the mean of its divisors is an integer number (1345002234174).

Almost surely, 2^{21121333316562} is an apocalyptic number.

21121333316562 is an abundant number, since it is smaller than the sum of its proper divisors (21918738177006).

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

21121333316562 is a wasteful number, since it uses less digits than its factorization.

21121333316562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576314.

The product of its digits is 116640, while the sum is 39.

Adding to 21121333316562 its reverse (26561333312112), we get a palindrome (47682666628674).

The spelling of 21121333316562 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty-three million, three hundred sixteen thousand, five hundred sixty-two".