21213556324522 has 8 divisors (see below), whose sum is σ = 32063237803872. Its totient is φ = 10525810389900.

The previous prime is 21213556324463. The next prime is 21213556324547. The reversal of 21213556324522 is 22542365531212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 40483885854 + ... + 40483886377.

It is an arithmetic number, because the mean of its divisors is an integer number (4007904725484).

Almost surely, 2^{21213556324522} is an apocalyptic number.

21213556324522 is a deficient number, since it is larger than the sum of its proper divisors (10849681479350).

21213556324522 is a wasteful number, since it uses less digits than its factorization.

21213556324522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80967772364.

The product of its digits is 864000, while the sum is 43.

The spelling of 21213556324522 in words is "twenty-one trillion, two hundred thirteen billion, five hundred fifty-six million, three hundred twenty-four thousand, five hundred twenty-two".