121021340323 has 4 divisors (see below), whose sum is σ = 130330674208. Its totient is φ = 111712006440.

The previous prime is 121021340311. The next prime is 121021340327. The reversal of 121021340323 is 323043120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323043120121 = 1087 ⋅297187783.

It is a cyclic number.

It is not a de Polignac number, because 121021340323 - 2⁵ = 121021340291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021340294 and 121021340303.

It is not an unprimeable number, because it can be changed into a prime (121021340327) 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, 4654666923 + ... + 4654666948.

It is an arithmetic number, because the mean of its divisors is an integer number (32582668552).

Almost surely, 2^121021340323 is an apocalyptic number.

121021340323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121021340323 is a deficient number, since it is larger than the sum of its proper divisors (9309333885).

121021340323 is an equidigital number, since it uses as much as digits as its factorization.

121021340323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9309333884.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 121021340323 its reverse (323043120121), we get a palindrome (444064460444).

The spelling of 121021340323 in words is "one hundred twenty-one billion, twenty-one million, three hundred forty thousand, three hundred twenty-three".