10121323109 has 2 divisors, whose sum is σ = 10121323110. Its totient is φ = 10121323108.

The previous prime is 10121323097. The next prime is 10121323111. The reversal of 10121323109 is 90132312101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8917024900 + 1204298209 = 94430^2 + 34703^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121323109 - 2³² = 5826355813 is a prime.

Together with 10121323111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121323129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060661554 + 5060661555.

It is an arithmetic number, because the mean of its divisors is an integer number (5060661555).

Almost surely, 2^10121323109 is an apocalyptic number.

It is an amenable number.

10121323109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121323109 is an equidigital number, since it uses as much as digits as its factorization.

10121323109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 10121323109 in words is "ten billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred nine".