203011331009 has 2 divisors, whose sum is σ = 203011331010. Its totient is φ = 203011331008.

The previous prime is 203011330997. The next prime is 203011331011. The reversal of 203011331009 is 900133110302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194644204225 + 8367126784 = 441185^2 + 91472^2 .

It is a cyclic number.

It is not a de Polignac number, because 203011331009 - 2¹⁶ = 203011265473 is a prime.

Together with 203011331011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (203011331209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101505665504 + 101505665505.

It is an arithmetic number, because the mean of its divisors is an integer number (101505665505).

Almost surely, 2^203011331009 is an apocalyptic number.

It is an amenable number.

203011331009 is a deficient number, since it is larger than the sum of its proper divisors (1).

203011331009 is an equidigital number, since it uses as much as digits as its factorization.

203011331009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 203011331009 in words is "two hundred three billion, eleven million, three hundred thirty-one thousand, nine".