21213166322 has 8 divisors (see below), whose sum is σ = 33494473200. Its totient is φ = 10048341924.

The previous prime is 21213166309. The next prime is 21213166333. The reversal of 21213166322 is 22366131212.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279120572 + ... + 279120647.

It is an arithmetic number, because the mean of its divisors is an integer number (4186809150).

Almost surely, 2^21213166322 is an apocalyptic number.

21213166322 is a deficient number, since it is larger than the sum of its proper divisors (12281306878).

21213166322 is a wasteful number, since it uses less digits than its factorization.

21213166322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558241240.

The product of its digits is 5184, while the sum is 29.

Adding to 21213166322 its reverse (22366131212), we get a palindrome (43579297534).

The spelling of 21213166322 in words is "twenty-one billion, two hundred thirteen million, one hundred sixty-six thousand, three hundred twenty-two".