121505107107 has 4 divisors (see below), whose sum is σ = 162006809480. Its totient is φ = 81003404736.

The previous prime is 121505107093. The next prime is 121505107109. The reversal of 121505107107 is 701701505121.

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

It is not a de Polignac number, because 121505107107 - 2⁷ = 121505106979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121505107109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20250851182 + ... + 20250851187.

It is an arithmetic number, because the mean of its divisors is an integer number (40501702370).

Almost surely, 2^121505107107 is an apocalyptic number.

121505107107 is a deficient number, since it is larger than the sum of its proper divisors (40501702373).

121505107107 is an equidigital number, since it uses as much as digits as its factorization.

121505107107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40501702372.

The product of its (nonzero) digits is 2450, while the sum is 30.

The spelling of 121505107107 in words is "one hundred twenty-one billion, five hundred five million, one hundred seven thousand, one hundred seven".