121751530747 has 16 divisors (see below), whose sum is σ = 155023782912. Its totient is φ = 92852781120.

The previous prime is 121751530741. The next prime is 121751530787. The reversal of 121751530747 is 747035157121.

It is not a de Polignac number, because 121751530747 - 2³ = 121751530739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121751530741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16817538 + ... + 16824775.

It is an arithmetic number, because the mean of its divisors is an integer number (9688986432).

Almost surely, 2^121751530747 is an apocalyptic number.

121751530747 is a deficient number, since it is larger than the sum of its proper divisors (33272252165).

121751530747 is a wasteful number, since it uses less digits than its factorization.

121751530747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33642378.

The product of its (nonzero) digits is 205800, while the sum is 43.

Adding to 121751530747 its reverse (747035157121), we get a palindrome (868786687868).

The spelling of 121751530747 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred thirty thousand, seven hundred forty-seven".