110121021221 has 2 divisors, whose sum is σ = 110121021222. Its totient is φ = 110121021220.

The previous prime is 110121021209. The next prime is 110121021239. The reversal of 110121021221 is 122120121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80719060321 + 29401960900 = 284111^2 + 171470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110121021221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110121021196 and 110121021205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110121021251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060510610 + 55060510611.

It is an arithmetic number, because the mean of its divisors is an integer number (55060510611).

Almost surely, 2^110121021221 is an apocalyptic number.

It is an amenable number.

110121021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121021221 is an equidigital number, since it uses as much as digits as its factorization.

110121021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 110121021221 its reverse (122120121011), we get a palindrome (232241142232).

The spelling of 110121021221 in words is "one hundred ten billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-one".