121551303121 has 4 divisors (see below), whose sum is σ = 121811584752. Its totient is φ = 121291021492.

The previous prime is 121551302959. The next prime is 121551303143. The reversal of 121551303121 is 121303155121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121551303121 - 2³³ = 112961368529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121551303191) 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, 130140115 + ... + 130141048.

It is an arithmetic number, because the mean of its divisors is an integer number (30452896188).

Almost surely, 2^121551303121 is an apocalyptic number.

It is an amenable number.

121551303121 is a deficient number, since it is larger than the sum of its proper divisors (260281631).

121551303121 is an equidigital number, since it uses as much as digits as its factorization.

121551303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260281630.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 121551303121 its reverse (121303155121), we get a palindrome (242854458242).

The spelling of 121551303121 in words is "one hundred twenty-one billion, five hundred fifty-one million, three hundred three thousand, one hundred twenty-one".