121751530763 has 4 divisors (see below), whose sum is σ = 125949859440. Its totient is φ = 117553202088.

The previous prime is 121751530741. The next prime is 121751530787. The reversal of 121751530763 is 367035157121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 367035157121 = 14879 ⋅24667999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121751530763 is a prime.

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 121751530763.

It is not an unprimeable number, because it can be changed into a prime (121751530363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099164295 + ... + 2099164352.

It is an arithmetic number, because the mean of its divisors is an integer number (31487464860).

Almost surely, 2^121751530763 is an apocalyptic number.

121751530763 is a deficient number, since it is larger than the sum of its proper divisors (4198328677).

121751530763 is an equidigital number, since it uses as much as digits as its factorization.

121751530763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198328676.

The product of its (nonzero) digits is 132300, while the sum is 41.

Adding to 121751530763 its reverse (367035157121), we get a palindrome (488786687884).

The spelling of 121751530763 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred thirty thousand, seven hundred sixty-three".