121636112041 has 4 divisors (see below), whose sum is σ = 122840430084. Its totient is φ = 120431794000.

The previous prime is 121636112033. The next prime is 121636112051. The reversal of 121636112041 is 140211636121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140211636121 = 101 ⋅1388234021.

It can be written as a sum of positive squares in 2 ways, for example, as 113825264400 + 7810847641 = 337380^2 + 88379^2 .

It is not a de Polignac number, because 121636112041 - 2³ = 121636112033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121636112051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602158870 + ... + 602159071.

It is an arithmetic number, because the mean of its divisors is an integer number (30710107521).

Almost surely, 2^121636112041 is an apocalyptic number.

It is an amenable number.

121636112041 is a deficient number, since it is larger than the sum of its proper divisors (1204318043).

121636112041 is a wasteful number, since it uses less digits than its factorization.

121636112041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204318042.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 121636112041 its reverse (140211636121), we get a palindrome (261847748162).

The spelling of 121636112041 in words is "one hundred twenty-one billion, six hundred thirty-six million, one hundred twelve thousand, forty-one".