121730503481 has 4 divisors (see below), whose sum is σ = 121777451892. Its totient is φ = 121683555072.

The previous prime is 121730503379. The next prime is 121730503513. The reversal of 121730503481 is 184305037121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65802510400 + 55927993081 = 256520^2 + 236491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121730503481 is a prime.

It is a super-2 number, since 2×121730503481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121730506481) 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 3 ways as a sum of consecutive naturals, for example, 23470316 + ... + 23475501.

It is an arithmetic number, because the mean of its divisors is an integer number (30444362973).

Almost surely, 2^121730503481 is an apocalyptic number.

It is an amenable number.

121730503481 is a deficient number, since it is larger than the sum of its proper divisors (46948411).

121730503481 is an equidigital number, since it uses as much as digits as its factorization.

121730503481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46948410.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 121730503481 in words is "one hundred twenty-one billion, seven hundred thirty million, five hundred three thousand, four hundred eighty-one".