121117477 has 8 divisors (see below), whose sum is σ = 130808664. Its totient is φ = 111479808.

The previous prime is 121117459. The next prime is 121117489. The reversal of 121117477 is 774711121.

It can be written as a sum of positive squares in 4 ways, for example, as 1674436 + 119443041 = 1294^2 + 10929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121117477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121117177) 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 7 ways as a sum of consecutive naturals, for example, 8608 + ... + 17785.

It is an arithmetic number, because the mean of its divisors is an integer number (16351083).

Almost surely, 2^121117477 is an apocalyptic number.

It is an amenable number.

121117477 is a deficient number, since it is larger than the sum of its proper divisors (9691187).

121117477 is a wasteful number, since it uses less digits than its factorization.

121117477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26759.

The product of its digits is 2744, while the sum is 31.

The square root of 121117477 is about 11005.3385681677. The cubic root of 121117477 is about 494.7687618376.

Adding to 121117477 its reverse (774711121), we get a palindrome (895828598).

The spelling of 121117477 in words is "one hundred twenty-one million, one hundred seventeen thousand, four hundred seventy-seven".