121011021012221 has 2 divisors, whose sum is σ = 121011021012222. Its totient is φ = 121011021012220.

The previous prime is 121011021012199. The next prime is 121011021012239. The reversal of 121011021012221 is 122210120110121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118420949215321 + 2590071796900 = 10882139^2 + 1609370^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011021012221 - 2¹⁰ = 121011021011197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121011021012221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121011021012241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505510506110 + 60505510506111.

It is an arithmetic number, because the mean of its divisors is an integer number (60505510506111).

Almost surely, 2^{121011021012221} is an apocalyptic number.

It is an amenable number.

121011021012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011021012221 is an equidigital number, since it uses as much as digits as its factorization.

121011021012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121011021012221 its reverse (122210120110121), we get a palindrome (243221141122342).

The spelling of 121011021012221 in words is "one hundred twenty-one trillion, eleven billion, twenty-one million, twelve thousand, two hundred twenty-one".