121801763159 has 4 divisors (see below), whose sum is σ = 127097492016. Its totient is φ = 116506034304.

The previous prime is 121801763141. The next prime is 121801763173. The reversal of 121801763159 is 951367108121.

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

It is a cyclic number.

It is not a de Polignac number, because 121801763159 - 2⁸ = 121801762903 is a prime.

It is a super-2 number, since 2×121801763159² (a number of 23 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 (121801763179) 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 3 ways as a sum of consecutive naturals, for example, 2647864394 + ... + 2647864439.

It is an arithmetic number, because the mean of its divisors is an integer number (31774373004).

Almost surely, 2^121801763159 is an apocalyptic number.

121801763159 is a deficient number, since it is larger than the sum of its proper divisors (5295728857).

121801763159 is an equidigital number, since it uses as much as digits as its factorization.

121801763159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295728856.

The product of its (nonzero) digits is 90720, while the sum is 44.

The spelling of 121801763159 in words is "one hundred twenty-one billion, eight hundred one million, seven hundred sixty-three thousand, one hundred fifty-nine".