121321320221121 has 4 divisors (see below), whose sum is σ = 161761760294832. Its totient is φ = 80880880147412.

The previous prime is 121321320221113. The next prime is 121321320221173. The reversal of 121321320221121 is 121122023123121.

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 121321320221121 - 2³ = 121321320221113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121321320221091 and 121321320221100.

It is not an unprimeable number, because it can be changed into a prime (121321320223121) 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, 20220220036851 + ... + 20220220036856.

It is an arithmetic number, because the mean of its divisors is an integer number (40440440073708).

Almost surely, 2^{121321320221121} is an apocalyptic number.

It is an amenable number.

121321320221121 is a deficient number, since it is larger than the sum of its proper divisors (40440440073711).

121321320221121 is an equidigital number, since it uses as much as digits as its factorization.

121321320221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40440440073710.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 121321320221121 its reverse (121122023123121), we get a palindrome (242443343344242).

The spelling of 121321320221121 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, three hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".