10231123121209 has 2 divisors, whose sum is σ = 10231123121210. Its totient is φ = 10231123121208.

The previous prime is 10231123121147. The next prime is 10231123121231. The reversal of 10231123121209 is 90212132113201.

10231123121209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8316608125609 + 1914514995600 = 2883853^2 + 1383660^2 .

It is a cyclic number.

It is not a de Polignac number, because 10231123121209 - 2³³ = 10222533186617 is a prime.

It is not a weakly prime, because it can be changed into another prime (10231123121299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115561560604 + 5115561560605.

It is an arithmetic number, because the mean of its divisors is an integer number (5115561560605).

Almost surely, 2^{10231123121209} is an apocalyptic number.

It is an amenable number.

10231123121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10231123121209 is an equidigital number, since it uses as much as digits as its factorization.

10231123121209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 10231123121209 in words is "ten trillion, two hundred thirty-one billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred nine".