121377257 has 2 divisors, whose sum is σ = 121377258. Its totient is φ = 121377256.

The previous prime is 121377227. The next prime is 121377287. The reversal of 121377257 is 752773121.

It is a balanced prime because it is at equal distance from previous prime (121377227) and next prime (121377287).

It can be written as a sum of positive squares in only one way, i.e., 63936016 + 57441241 = 7996^2 + 7579^2 .

It is a cyclic number.

It is not a de Polignac number, because 121377257 - 2⁸ = 121377001 is a prime.

It is not a weakly prime, because it can be changed into another prime (121377227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60688628 + 60688629.

It is an arithmetic number, because the mean of its divisors is an integer number (60688629).

Almost surely, 2^121377257 is an apocalyptic number.

It is an amenable number.

121377257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121377257 is an equidigital number, since it uses as much as digits as its factorization.

121377257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20580, while the sum is 35.

The square root of 121377257 is about 11017.1347000933. The cubic root of 121377257 is about 495.1222457658.

The spelling of 121377257 in words is "one hundred twenty-one million, three hundred seventy-seven thousand, two hundred fifty-seven".