12222320213172 has 96 divisors (see below), whose sum is σ = 28946263650304. Its totient is φ = 4013554406400.

The previous prime is 12222320213171. The next prime is 12222320213239. The reversal of 12222320213172 is 27131202322221.

It is a super-2 number, since 2×12222320213172² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222320213171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182299368 + ... + 182366400.

Almost surely, 2^{12222320213172} is an apocalyptic number.

12222320213172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222320213172 is an abundant number, since it is smaller than the sum of its proper divisors (16723943437132).

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

12222320213172 is a wasteful number, since it uses less digits than its factorization.

12222320213172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68009 (or 68007 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

Adding to 12222320213172 its reverse (27131202322221), we get a palindrome (39353522535393).

The spelling of 12222320213172 in words is "twelve trillion, two hundred twenty-two billion, three hundred twenty million, two hundred thirteen thousand, one hundred seventy-two".