121323323021 has 2 divisors, whose sum is σ = 121323323022. Its totient is φ = 121323323020.

The previous prime is 121323322963. The next prime is 121323323041. The reversal of 121323323021 is 120323323121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81231270121 + 40092052900 = 285011^2 + 200230^2 .

It is a cyclic number.

It is not a de Polignac number, because 121323323021 - 2⁶ = 121323322957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121323323041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60661661510 + 60661661511.

It is an arithmetic number, because the mean of its divisors is an integer number (60661661511).

Almost surely, 2^121323323021 is an apocalyptic number.

It is an amenable number.

121323323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121323323021 is an equidigital number, since it uses as much as digits as its factorization.

121323323021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 121323323021 its reverse (120323323121), we get a palindrome (241646646142).

The spelling of 121323323021 in words is "one hundred twenty-one billion, three hundred twenty-three million, three hundred twenty-three thousand, twenty-one".