121336784977 has 2 divisors, whose sum is σ = 121336784978. Its totient is φ = 121336784976.

The previous prime is 121336784893. The next prime is 121336784999. The reversal of 121336784977 is 779487633121.

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., 121327519041 + 9265936 = 348321^2 + 3044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121336784977 is a prime.

It is not a weakly prime, because it can be changed into another prime (121336784077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60668392488 + 60668392489.

It is an arithmetic number, because the mean of its divisors is an integer number (60668392489).

Almost surely, 2^121336784977 is an apocalyptic number.

It is an amenable number.

121336784977 is a deficient number, since it is larger than the sum of its proper divisors (1).

121336784977 is an equidigital number, since it uses as much as digits as its factorization.

121336784977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 58.

The spelling of 121336784977 in words is "one hundred twenty-one billion, three hundred thirty-six million, seven hundred eighty-four thousand, nine hundred seventy-seven".