221022102002120 has 16 divisors (see below), whose sum is σ = 497299729504860. Its totient is φ = 88408840800832.

The previous prime is 221022102002089. The next prime is 221022102002203. The reversal of 221022102002120 is 21200201220122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 218333544940996 + 2688557061124 = 14776114^2 + 1639682^2 .

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, 2762776274987 + ... + 2762776275066.

Almost surely, 2^{221022102002120} is an apocalyptic number.

221022102002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022102002120 is an abundant number, since it is smaller than the sum of its proper divisors (276277627502740).

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

221022102002120 is a wasteful number, since it uses less digits than its factorization.

221022102002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525552550064 (or 5525552550060 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221022102002120 its reverse (21200201220122), we get a palindrome (242222303222242).

The spelling of 221022102002120 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred two million, two thousand, one hundred twenty".