121216020049 has 2 divisors, whose sum is σ = 121216020050. Its totient is φ = 121216020048.

The previous prime is 121216020019. The next prime is 121216020053. The reversal of 121216020049 is 940020612121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108807619600 + 12408400449 = 329860^2 + 111393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121216020049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121216019999 and 121216020026.

It is not a weakly prime, because it can be changed into another prime (121216020019) 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, 60608010024 + 60608010025.

It is an arithmetic number, because the mean of its divisors is an integer number (60608010025).

Almost surely, 2^121216020049 is an apocalyptic number.

It is an amenable number.

121216020049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121216020049 is an equidigital number, since it uses as much as digits as its factorization.

121216020049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 121216020049 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, forty-nine".