121102020901 has 2 divisors, whose sum is σ = 121102020902. Its totient is φ = 121102020900.

The previous prime is 121102020877. The next prime is 121102020917. The reversal of 121102020901 is 109020201121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72778550625 + 48323470276 = 269775^2 + 219826^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102020901 - 2¹⁷ = 121101889829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121102020961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551010450 + 60551010451.

It is an arithmetic number, because the mean of its divisors is an integer number (60551010451).

Almost surely, 2^121102020901 is an apocalyptic number.

It is an amenable number.

121102020901 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102020901 is an equidigital number, since it uses as much as digits as its factorization.

121102020901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 121102020901 in words is "one hundred twenty-one billion, one hundred two million, twenty thousand, nine hundred one".