121517927 has 2 divisors, whose sum is σ = 121517928. Its totient is φ = 121517926.

The previous prime is 121517881. The next prime is 121517951. The reversal of 121517927 is 729715121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121517927 - 2¹⁰ = 121516903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121517987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60758963 + 60758964.

It is an arithmetic number, because the mean of its divisors is an integer number (60758964).

Almost surely, 2^121517927 is an apocalyptic number.

121517927 is a deficient number, since it is larger than the sum of its proper divisors (1).

121517927 is an equidigital number, since it uses as much as digits as its factorization.

121517927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 35.

The square root of 121517927 is about 11023.5169977644. The cubic root of 121517927 is about 495.3134456629.

The spelling of 121517927 in words is "one hundred twenty-one million, five hundred seventeen thousand, nine hundred twenty-seven".