121668708927 has 4 divisors (see below), whose sum is σ = 162224945240. Its totient is φ = 81112472616.

The previous prime is 121668708923. The next prime is 121668708961. The reversal of 121668708927 is 729807866121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121668708927 - 2² = 121668708923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121668708923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20278118152 + ... + 20278118157.

It is an arithmetic number, because the mean of its divisors is an integer number (40556236310).

Almost surely, 2^121668708927 is an apocalyptic number.

121668708927 is a deficient number, since it is larger than the sum of its proper divisors (40556236313).

121668708927 is an equidigital number, since it uses as much as digits as its factorization.

121668708927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40556236312.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 121668708927 in words is "one hundred twenty-one billion, six hundred sixty-eight million, seven hundred eight thousand, nine hundred twenty-seven".