121880537161 has 4 divisors (see below), whose sum is σ = 125812167424. Its totient is φ = 117948906900.

The previous prime is 121880537159. The next prime is 121880537197. The reversal of 121880537161 is 161735088121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121880537161 - 2¹ = 121880537159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121880531161) 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, 1965815085 + ... + 1965815146.

It is an arithmetic number, because the mean of its divisors is an integer number (31453041856).

Almost surely, 2^121880537161 is an apocalyptic number.

It is an amenable number.

121880537161 is a deficient number, since it is larger than the sum of its proper divisors (3931630263).

121880537161 is an equidigital number, since it uses as much as digits as its factorization.

121880537161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931630262.

The product of its (nonzero) digits is 80640, while the sum is 43.

The spelling of 121880537161 in words is "one hundred twenty-one billion, eight hundred eighty million, five hundred thirty-seven thousand, one hundred sixty-one".