121136801 has 4 divisors (see below), whose sum is σ = 122385732. Its totient is φ = 119887872.

The previous prime is 121136777. The next prime is 121136833. The reversal of 121136801 is 108631121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108631121 = 653 ⋅166357.

It can be written as a sum of positive squares in 2 ways, for example, as 63361600 + 57775201 = 7960^2 + 7601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121136801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121136861) 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, 624320 + ... + 624513.

It is an arithmetic number, because the mean of its divisors is an integer number (30596433).

Almost surely, 2^121136801 is an apocalyptic number.

It is an amenable number.

121136801 is a deficient number, since it is larger than the sum of its proper divisors (1248931).

121136801 is an equidigital number, since it uses as much as digits as its factorization.

121136801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248930.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 121136801 is about 11006.2164707042. The cubic root of 121136801 is about 494.7950734908.

Adding to 121136801 its reverse (108631121), we get a palindrome (229767922).

The spelling of 121136801 in words is "one hundred twenty-one million, one hundred thirty-six thousand, eight hundred one".