1321023304121 has 4 divisors (see below), whose sum is σ = 1321472787600. Its totient is φ = 1320573820644.

The previous prime is 1321023304049. The next prime is 1321023304147. The reversal of 1321023304121 is 1214033201231.

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 1321023304121 - 2²⁶ = 1320956195257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321023304171) 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, 224737331 + ... + 224743208.

It is an arithmetic number, because the mean of its divisors is an integer number (330368196900).

Almost surely, 2^{1321023304121} is an apocalyptic number.

It is an amenable number.

1321023304121 is a deficient number, since it is larger than the sum of its proper divisors (449483479).

1321023304121 is an equidigital number, since it uses as much as digits as its factorization.

1321023304121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449483478.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321023304121 its reverse (1214033201231), we get a palindrome (2535056505352).

The spelling of 1321023304121 in words is "one trillion, three hundred twenty-one billion, twenty-three million, three hundred four thousand, one hundred twenty-one".