21213543315404 has 48 divisors (see below), whose sum is σ = 41842892722176. Its totient is φ = 9323009923200.

The previous prime is 21213543315331. The next prime is 21213543315457. The reversal of 21213543315404 is 40451334531212.

It is a super-3 number, since 3×21213543315404³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5545577 + ... + 8554560.

It is an arithmetic number, because the mean of its divisors is an integer number (871726931712).

Almost surely, 2^{21213543315404} is an apocalyptic number.

It is an amenable number.

21213543315404 is a deficient number, since it is larger than the sum of its proper divisors (20629349406772).

21213543315404 is a wasteful number, since it uses less digits than its factorization.

21213543315404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14101286 (or 14101284 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 21213543315404 its reverse (40451334531212), we get a palindrome (61664877846616).

The spelling of 21213543315404 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, four hundred four".