121011000221 has 2 divisors, whose sum is σ = 121011000222. Its totient is φ = 121011000220.

The previous prime is 121011000199. The next prime is 121011000223. The reversal of 121011000221 is 122000110121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121007275321 + 3724900 = 347861^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011000221 - 2¹⁴ = 121010983837 is a prime.

Together with 121011000223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121011000223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505500110 + 60505500111.

It is an arithmetic number, because the mean of its divisors is an integer number (60505500111).

Almost surely, 2^121011000221 is an apocalyptic number.

It is an amenable number.

121011000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011000221 is an equidigital number, since it uses as much as digits as its factorization.

121011000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121011000221 its reverse (122000110121), we get a palindrome (243011110342).

The spelling of 121011000221 in words is "one hundred twenty-one billion, eleven million, two hundred twenty-one", and thus it is an aban number.