121200212205901 has 2 divisors, whose sum is σ = 121200212205902. Its totient is φ = 121200212205900.

The previous prime is 121200212205881. The next prime is 121200212205931. The reversal of 121200212205901 is 109502212002121.

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., 64157312550276 + 57042899655625 = 8009826^2 + 7552675^2 .

It is a cyclic number.

It is not a de Polignac number, because 121200212205901 - 2³¹ = 121198064722253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121200212205901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121200212205931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600106102950 + 60600106102951.

It is an arithmetic number, because the mean of its divisors is an integer number (60600106102951).

Almost surely, 2^{121200212205901} is an apocalyptic number.

It is an amenable number.

121200212205901 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200212205901 is an equidigital number, since it uses as much as digits as its factorization.

121200212205901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 121200212205901 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twelve million, two hundred five thousand, nine hundred one".