203111054213 has 2 divisors, whose sum is σ = 203111054214. Its totient is φ = 203111054212.

The previous prime is 203111054149. The next prime is 203111054287. The reversal of 203111054213 is 312450111302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176549551684 + 26561502529 = 420178^2 + 162977^2 .

It is a cyclic number.

It is not a de Polignac number, because 203111054213 - 2⁶ = 203111054149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203111054413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101555527106 + 101555527107.

It is an arithmetic number, because the mean of its divisors is an integer number (101555527107).

Almost surely, 2^203111054213 is an apocalyptic number.

It is an amenable number.

203111054213 is a deficient number, since it is larger than the sum of its proper divisors (1).

203111054213 is an equidigital number, since it uses as much as digits as its factorization.

203111054213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 203111054213 its reverse (312450111302), we get a palindrome (515561165515).

The spelling of 203111054213 in words is "two hundred three billion, one hundred eleven million, fifty-four thousand, two hundred thirteen".