121556300323 has 4 divisors (see below), whose sum is σ = 127954000360. Its totient is φ = 115158600288.

The previous prime is 121556300317. The next prime is 121556300389. The reversal of 121556300323 is 323003655121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121556300323 - 2¹³ = 121556292131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121556300123) 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, 3198849990 + ... + 3198850027.

It is an arithmetic number, because the mean of its divisors is an integer number (31988500090).

Almost surely, 2^121556300323 is an apocalyptic number.

121556300323 is a deficient number, since it is larger than the sum of its proper divisors (6397700037).

121556300323 is an equidigital number, since it uses as much as digits as its factorization.

121556300323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6397700036.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 121556300323 its reverse (323003655121), we get a palindrome (444559955444).

The spelling of 121556300323 in words is "one hundred twenty-one billion, five hundred fifty-six million, three hundred thousand, three hundred twenty-three".