221120211021122 has 20 divisors (see below), whose sum is σ = 386937345533286. Its totient is φ = 94765804721280.

The previous prime is 221120211021041. The next prime is 221120211021131. The reversal of 221120211021122 is 221120112021122.

It can be written as a sum of positive squares in only one way, i.e., 200687993940721 + 20432217080401 = 14166439^2 + 4520201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221120211021094 and 221120211021103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 23023757279 + ... + 23023766882.

Almost surely, 2^{221120211021122} is an apocalyptic number.

221120211021122 is a deficient number, since it is larger than the sum of its proper divisors (165817134512164).

221120211021122 is an frugal number, since it uses more digits than its factorization.

221120211021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46047524191 (or 46047524170 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221120211021122 its reverse (221120112021122), we get a palindrome (442240323042244).

The spelling of 221120211021122 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred eleven million, twenty-one thousand, one hundred twenty-two".