121534520287 has 2 divisors, whose sum is σ = 121534520288. Its totient is φ = 121534520286.

The previous prime is 121534520269. The next prime is 121534520309. The reversal of 121534520287 is 782025435121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121534520287 - 2¹¹ = 121534518239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121534520227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60767260143 + 60767260144.

It is an arithmetic number, because the mean of its divisors is an integer number (60767260144).

Almost surely, 2^121534520287 is an apocalyptic number.

121534520287 is a deficient number, since it is larger than the sum of its proper divisors (1).

121534520287 is an equidigital number, since it uses as much as digits as its factorization.

121534520287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 121534520287 in words is "one hundred twenty-one billion, five hundred thirty-four million, five hundred twenty thousand, two hundred eighty-seven".