203241011381 has 2 divisors, whose sum is σ = 203241011382. Its totient is φ = 203241011380.

The previous prime is 203241011357. The next prime is 203241011419. The reversal of 203241011381 is 183110142302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136020078481 + 67220932900 = 368809^2 + 259270^2 .

It is a cyclic number.

It is not a de Polignac number, because 203241011381 - 2¹⁸ = 203240749237 is a prime.

It is a super-2 number, since 2×203241011381² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203241011381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203241019381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101620505690 + 101620505691.

It is an arithmetic number, because the mean of its divisors is an integer number (101620505691).

Almost surely, 2^203241011381 is an apocalyptic number.

It is an amenable number.

203241011381 is a deficient number, since it is larger than the sum of its proper divisors (1).

203241011381 is an equidigital number, since it uses as much as digits as its factorization.

203241011381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 203241011381 its reverse (183110142302), we get a palindrome (386351153683).

The spelling of 203241011381 in words is "two hundred three billion, two hundred forty-one million, eleven thousand, three hundred eighty-one".