231111133322009 has 2 divisors, whose sum is σ = 231111133322010. Its totient is φ = 231111133322008.

The previous prime is 231111133321951. The next prime is 231111133322029. The reversal of 231111133322009 is 900223331111132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199966608312025 + 31144525009984 = 14140955^2 + 5580728^2 .

It is a cyclic number.

It is not a de Polignac number, because 231111133322009 - 2⁸ = 231111133321753 is a prime.

It is not a weakly prime, because it can be changed into another prime (231111133322029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115555566661004 + 115555566661005.

It is an arithmetic number, because the mean of its divisors is an integer number (115555566661005).

Almost surely, 2^{231111133322009} is an apocalyptic number.

It is an amenable number.

231111133322009 is a deficient number, since it is larger than the sum of its proper divisors (1).

231111133322009 is an equidigital number, since it uses as much as digits as its factorization.

231111133322009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 231111133322009 in words is "two hundred thirty-one trillion, one hundred eleven billion, one hundred thirty-three million, three hundred twenty-two thousand, nine".