121117481 has 4 divisors (see below), whose sum is σ = 121930500. Its totient is φ = 120304464.

The previous prime is 121117459. The next prime is 121117489. The reversal of 121117481 is 184711121.

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 9709456 + 111408025 = 3116^2 + 10555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121117481 is a prime.

It is a super-2 number, since 2×121117481² = 29338888407570722, which contains 22 as substring.

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 121117481.

It is not an unprimeable number, because it can be changed into a prime (121117489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406286 + ... + 406583.

It is an arithmetic number, because the mean of its divisors is an integer number (30482625).

Almost surely, 2^121117481 is an apocalyptic number.

It is an amenable number.

121117481 is a deficient number, since it is larger than the sum of its proper divisors (813019).

121117481 is an equidigital number, since it uses as much as digits as its factorization.

121117481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813018.

The product of its digits is 448, while the sum is 26.

The square root of 121117481 is about 11005.3387498977. The cubic root of 121117481 is about 494.7687672843.

The spelling of 121117481 in words is "one hundred twenty-one million, one hundred seventeen thousand, four hundred eighty-one".