121753242861 has 16 divisors (see below), whose sum is σ = 165594663168. Its totient is φ = 79549934400.

The previous prime is 121753242851. The next prime is 121753242869. The reversal of 121753242861 is 168242357121.

It is not a de Polignac number, because 121753242861 - 2⁶ = 121753242797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121753242869) 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 15 ways as a sum of consecutive naturals, for example, 1150245 + ... + 1251626.

It is an arithmetic number, because the mean of its divisors is an integer number (10349666448).

Almost surely, 2^121753242861 is an apocalyptic number.

It is an amenable number.

121753242861 is a deficient number, since it is larger than the sum of its proper divisors (43841420307).

121753242861 is a wasteful number, since it uses less digits than its factorization.

121753242861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402212.

The product of its digits is 161280, while the sum is 42.

Adding to 121753242861 its reverse (168242357121), we get a palindrome (289995599982).

The spelling of 121753242861 in words is "one hundred twenty-one billion, seven hundred fifty-three million, two hundred forty-two thousand, eight hundred sixty-one".