121316477 has 2 divisors, whose sum is σ = 121316478. Its totient is φ = 121316476.

The previous prime is 121316473. The next prime is 121316479. The reversal of 121316477 is 774613121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121308196 + 8281 = 11014^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 121316477 - 2² = 121316473 is a prime.

Together with 121316479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121316473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60658238 + 60658239.

It is an arithmetic number, because the mean of its divisors is an integer number (60658239).

Almost surely, 2^121316477 is an apocalyptic number.

It is an amenable number.

121316477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121316477 is an equidigital number, since it uses as much as digits as its factorization.

121316477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 121316477 is about 11014.3759242183. The cubic root of 121316477 is about 495.0395873519.

Adding to 121316477 its reverse (774613121), we get a palindrome (895929598).

The spelling of 121316477 in words is "one hundred twenty-one million, three hundred sixteen thousand, four hundred seventy-seven".