221122202112 has 120 divisors (see below), whose sum is σ = 729341417376. Its totient is φ = 63177762816.

The previous prime is 221122202083. The next prime is 221122202117. The reversal of 221122202112 is 211202221122.

It is a happy number.

221122202112 is a `hidden beast` number, since 221 + 12 + 220 + 211 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221122202117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3395358 + ... + 3459869.

Almost surely, 2^221122202112 is an apocalyptic number.

It is an amenable number.

221122202112 is an abundant number, since it is smaller than the sum of its proper divisors (508219215264).

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

221122202112 is an equidigital number, since it uses as much as digits as its factorization.

221122202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6855258 (or 6855239 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221122202112 its reverse (211202221122), we get a palindrome (432324423234).

The spelling of 221122202112 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred two thousand, one hundred twelve".