10123112261 has 2 divisors, whose sum is σ = 10123112262. Its totient is φ = 10123112260.

The previous prime is 10123112231. The next prime is 10123112323. The reversal of 10123112261 is 16221132101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9387672100 + 735440161 = 96890^2 + 27119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10123112261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10123112231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061556130 + 5061556131.

It is an arithmetic number, because the mean of its divisors is an integer number (5061556131).

Almost surely, 2^10123112261 is an apocalyptic number.

It is an amenable number.

10123112261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10123112261 is an equidigital number, since it uses as much as digits as its factorization.

10123112261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 10123112261 its reverse (16221132101), we get a palindrome (26344244362).

The spelling of 10123112261 in words is "ten billion, one hundred twenty-three million, one hundred twelve thousand, two hundred sixty-one".