121221022049 has 2 divisors, whose sum is σ = 121221022050. Its totient is φ = 121221022048.

The previous prime is 121221022033. The next prime is 121221022127. The reversal of 121221022049 is 940220122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120131560000 + 1089462049 = 346600^2 + 33007^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221022049 - 2⁴ = 121221022033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121221022649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610511024 + 60610511025.

It is an arithmetic number, because the mean of its divisors is an integer number (60610511025).

Almost surely, 2^121221022049 is an apocalyptic number.

It is an amenable number.

121221022049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221022049 is an equidigital number, since it uses as much as digits as its factorization.

121221022049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 121221022049 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, forty-nine".