1121010110221 has 2 divisors, whose sum is σ = 1121010110222. Its totient is φ = 1121010110220.

The previous prime is 1121010110219. The next prime is 1121010110237. The reversal of 1121010110221 is 1220110101211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739919954596 + 381090155625 = 860186^2 + 617325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121010110221 - 2¹ = 1121010110219 is a prime.

Together with 1121010110219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121010110821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560505055110 + 560505055111.

It is an arithmetic number, because the mean of its divisors is an integer number (560505055111).

Almost surely, 2^{1121010110221} is an apocalyptic number.

It is an amenable number.

1121010110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121010110221 is an equidigital number, since it uses as much as digits as its factorization.

1121010110221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121010110221 its reverse (1220110101211), we get a palindrome (2341120211432).

The spelling of 1121010110221 in words is "one trillion, one hundred twenty-one billion, ten million, one hundred ten thousand, two hundred twenty-one".