21222052420324 has 12 divisors (see below), whose sum is σ = 42444104840704. Its totient is φ = 9095165322984.

The previous prime is 21222052420279. The next prime is 21222052420369. The reversal of 21222052420324 is 42302425022212.

It is an interprime number because it is at equal distance from previous prime (21222052420279) and next prime (21222052420369).

21222052420324 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378965221764 + ... + 378965221819.

Almost surely, 2^{21222052420324} is an apocalyptic number.

It is an amenable number.

21222052420324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21222052420324 is a wasteful number, since it uses less digits than its factorization.

21222052420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757930443594 (or 757930443592 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 21222052420324 its reverse (42302425022212), we get a palindrome (63524477442536).

The spelling of 21222052420324 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred twenty thousand, three hundred twenty-four".