121531127 has 2 divisors, whose sum is σ = 121531128. Its totient is φ = 121531126.

The previous prime is 121531117. The next prime is 121531153. The reversal of 121531127 is 721135121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121531127 - 2¹² = 121527031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121531117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60765563 + 60765564.

It is an arithmetic number, because the mean of its divisors is an integer number (60765564).

Almost surely, 2^121531127 is an apocalyptic number.

121531127 is a deficient number, since it is larger than the sum of its proper divisors (1).

121531127 is an equidigital number, since it uses as much as digits as its factorization.

121531127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 23.

The square root of 121531127 is about 11024.1157014973. The cubic root of 121531127 is about 495.3313796444.

Adding to 121531127 its reverse (721135121), we get a palindrome (842666248).

The spelling of 121531127 in words is "one hundred twenty-one million, five hundred thirty-one thousand, one hundred twenty-seven".