121391694350687 has 8 divisors (see below), whose sum is σ = 127798242447600. Its totient is φ = 114986897409024.

The previous prime is 121391694350683. The next prime is 121391694350723. The reversal of 121391694350687 is 786053496193121.

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

It is not a de Polignac number, because 121391694350687 - 2² = 121391694350683 is a prime.

It is a super-2 number, since 2×121391694350687² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121391694350683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437646512 + ... + 437923797.

It is an arithmetic number, because the mean of its divisors is an integer number (15974780305950).

It is a 1-persistent number, because it is pandigital, but 2⋅121391694350687 = 242783388701374 is not.

Almost surely, 2^{121391694350687} is an apocalyptic number.

121391694350687 is a deficient number, since it is larger than the sum of its proper divisors (6406548096913).

121391694350687 is an equidigital number, since it uses as much as digits as its factorization.

121391694350687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875577625.

The product of its (nonzero) digits is 58786560, while the sum is 65.

The spelling of 121391694350687 in words is "one hundred twenty-one trillion, three hundred ninety-one billion, six hundred ninety-four million, three hundred fifty thousand, six hundred eighty-seven".