10121555165 has 16 divisors (see below), whose sum is σ = 12649841280. Its totient is φ = 7767426240.

The previous prime is 10121555161. The next prime is 10121555177. The reversal of 10121555165 is 56155512101.

It is not a de Polignac number, because 10121555165 - 2² = 10121555161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121555161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372155 + ... + 398424.

It is an arithmetic number, because the mean of its divisors is an integer number (790615080).

Almost surely, 2^10121555165 is an apocalyptic number.

It is an amenable number.

10121555165 is a deficient number, since it is larger than the sum of its proper divisors (2528286115).

10121555165 is an equidigital number, since it uses as much as digits as its factorization.

10121555165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770692.

The product of its (nonzero) digits is 7500, while the sum is 32.

The spelling of 10121555165 in words is "ten billion, one hundred twenty-one million, five hundred fifty-five thousand, one hundred sixty-five".