21222212213330 has 8 divisors (see below), whose sum is σ = 38199981984012. Its totient is φ = 8488884885328.

The previous prime is 21222212213329. The next prime is 21222212213347. The reversal of 21222212213330 is 3331221222212.

It can be written as a sum of positive squares in 2 ways, for example, as 20247903054289 + 974309159041 = 4499767^2 + 987071^2 .

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

It is a super-2 number, since 2×21222212213330² (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 21222212213330.

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, 1061110610657 + ... + 1061110610676.

Almost surely, 2^{21222212213330} is an apocalyptic number.

21222212213330 is a deficient number, since it is larger than the sum of its proper divisors (16977769770682).

21222212213330 is a wasteful number, since it uses less digits than its factorization.

21222212213330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122221221340.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21222212213330 its reverse (3331221222212), we get a palindrome (24553433435542).

The spelling of 21222212213330 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred thirteen thousand, three hundred thirty".