121816668151 has 2 divisors, whose sum is σ = 121816668152. Its totient is φ = 121816668150.

The previous prime is 121816668143. The next prime is 121816668161. The reversal of 121816668151 is 151866618121.

It is a weak prime.

It is an emirp because it is prime and its reverse (151866618121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121816668151 - 2³ = 121816668143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121816668161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60908334075 + 60908334076.

It is an arithmetic number, because the mean of its divisors is an integer number (60908334076).

Almost surely, 2^121816668151 is an apocalyptic number.

121816668151 is a deficient number, since it is larger than the sum of its proper divisors (1).

121816668151 is an equidigital number, since it uses as much as digits as its factorization.

121816668151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 46.

The spelling of 121816668151 in words is "one hundred twenty-one billion, eight hundred sixteen million, six hundred sixty-eight thousand, one hundred fifty-one".