10203112261 has 2 divisors, whose sum is σ = 10203112262. Its totient is φ = 10203112260.

The previous prime is 10203112217. The next prime is 10203112289. The reversal of 10203112261 is 16221130201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7609247361 + 2593864900 = 87231^2 + 50930^2 .

It is an emirp because it is prime and its reverse (16221130201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10203112261 - 2¹¹ = 10203110213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10203112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101556130 + 5101556131.

It is an arithmetic number, because the mean of its divisors is an integer number (5101556131).

Almost surely, 2^10203112261 is an apocalyptic number.

It is an amenable number.

10203112261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203112261 is an equidigital number, since it uses as much as digits as its factorization.

10203112261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 10203112261 its reverse (16221130201), we get a palindrome (26424242462).

The spelling of 10203112261 in words is "ten billion, two hundred three million, one hundred twelve thousand, two hundred sixty-one".