121688907739 has 8 divisors (see below), whose sum is σ = 139164364800. Its totient is φ = 104236282536.

The previous prime is 121688907737. The next prime is 121688907761. The reversal of 121688907739 is 937709886121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121688907739 - 2¹ = 121688907737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121688907737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5696539 + ... + 5717860.

It is an arithmetic number, because the mean of its divisors is an integer number (17395545600).

Almost surely, 2^121688907739 is an apocalyptic number.

121688907739 is a deficient number, since it is larger than the sum of its proper divisors (17475457061).

121688907739 is a wasteful number, since it uses less digits than its factorization.

121688907739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11415929.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 121688907739 in words is "one hundred twenty-one billion, six hundred eighty-eight million, nine hundred seven thousand, seven hundred thirty-nine".