121250277749 has 2 divisors, whose sum is σ = 121250277750. Its totient is φ = 121250277748.

The previous prime is 121250277739. The next prime is 121250277779. The reversal of 121250277749 is 947772052121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98396397124 + 22853880625 = 313682^2 + 151175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121250277749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121250277739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60625138874 + 60625138875.

It is an arithmetic number, because the mean of its divisors is an integer number (60625138875).

Almost surely, 2^121250277749 is an apocalyptic number.

It is an amenable number.

121250277749 is a deficient number, since it is larger than the sum of its proper divisors (1).

121250277749 is an equidigital number, since it uses as much as digits as its factorization.

121250277749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 121250277749 in words is "one hundred twenty-one billion, two hundred fifty million, two hundred seventy-seven thousand, seven hundred forty-nine".