203203111109 has 2 divisors, whose sum is σ = 203203111110. Its totient is φ = 203203111108.

The previous prime is 203203111087. The next prime is 203203111127. The reversal of 203203111109 is 901111302302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145864414084 + 57338697025 = 381922^2 + 239455^2 .

It is a cyclic number.

It is not a de Polignac number, because 203203111109 - 2²⁴ = 203186333893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203203111129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101601555554 + 101601555555.

It is an arithmetic number, because the mean of its divisors is an integer number (101601555555).

Almost surely, 2^203203111109 is an apocalyptic number.

It is an amenable number.

203203111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

203203111109 is an equidigital number, since it uses as much as digits as its factorization.

203203111109 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 203203111109 in words is "two hundred three billion, two hundred three million, one hundred eleven thousand, one hundred nine".