21222112503342 has 16 divisors (see below), whose sum is σ = 42445337530752. Its totient is φ = 7073852080440.

The previous prime is 21222112503313. The next prime is 21222112503359. The reversal of 21222112503342 is 24330521122212.

It is a happy number.

It is a super-2 number, since 2×21222112503342² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46107084 + ... + 46565087.

It is an arithmetic number, because the mean of its divisors is an integer number (2652833595672).

Almost surely, 2^{21222112503342} is an apocalyptic number.

21222112503342 is an abundant number, since it is smaller than the sum of its proper divisors (21223225027410).

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

21222112503342 is a wasteful number, since it uses less digits than its factorization.

21222112503342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92710343.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21222112503342 its reverse (24330521122212), we get a palindrome (45552633625554).

The spelling of 21222112503342 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, five hundred three thousand, three hundred forty-two".