121001323121 has 4 divisors (see below), whose sum is σ = 138287226432. Its totient is φ = 103715419812.

The previous prime is 121001323117. The next prime is 121001323123. The reversal of 121001323121 is 121323100121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121323100121 = 31 ⋅3913648391.

It is a cyclic number.

It is not a de Polignac number, because 121001323121 - 2² = 121001323117 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 121001323121.

It is not an unprimeable number, because it can be changed into a prime (121001323123) 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 3 ways as a sum of consecutive naturals, for example, 8642951645 + ... + 8642951658.

It is an arithmetic number, because the mean of its divisors is an integer number (34571806608).

Almost surely, 2^121001323121 is an apocalyptic number.

It is an amenable number.

121001323121 is a deficient number, since it is larger than the sum of its proper divisors (17285903311).

121001323121 is an equidigital number, since it uses as much as digits as its factorization.

121001323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17285903310.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121001323121 its reverse (121323100121), we get a palindrome (242324423242).

The spelling of 121001323121 in words is "one hundred twenty-one billion, one million, three hundred twenty-three thousand, one hundred twenty-one".