121277287 has 2 divisors, whose sum is σ = 121277288. Its totient is φ = 121277286.

The previous prime is 121277267. The next prime is 121277297. The reversal of 121277287 is 782772121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121277287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121277227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60638643 + 60638644.

It is an arithmetic number, because the mean of its divisors is an integer number (60638644).

Almost surely, 2^121277287 is an apocalyptic number.

121277287 is a deficient number, since it is larger than the sum of its proper divisors (1).

121277287 is an equidigital number, since it uses as much as digits as its factorization.

121277287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21952, while the sum is 37.

The square root of 121277287 is about 11012.5967419133. The cubic root of 121277287 is about 494.9862758498.

The spelling of 121277287 in words is "one hundred twenty-one million, two hundred seventy-seven thousand, two hundred eighty-seven".