121801763161 has 16 divisors (see below), whose sum is σ = 133066378368. Its totient is φ = 110809036800.

The previous prime is 121801763141. The next prime is 121801763173. The reversal of 121801763161 is 161367108121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121801763161 - 2¹¹ = 121801761113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121801763161.

It is not an unprimeable number, because it can be changed into a prime (121801763141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2720025 + ... + 2764441.

It is an arithmetic number, because the mean of its divisors is an integer number (8316648648).

Almost surely, 2^121801763161 is an apocalyptic number.

It is an amenable number.

121801763161 is a deficient number, since it is larger than the sum of its proper divisors (11264615207).

121801763161 is a wasteful number, since it uses less digits than its factorization.

121801763161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47472.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 121801763161 in words is "one hundred twenty-one billion, eight hundred one million, seven hundred sixty-three thousand, one hundred sixty-one".