101289484781 has 2 divisors, whose sum is σ = 101289484782. Its totient is φ = 101289484780.

The previous prime is 101289484771. The next prime is 101289484817. The reversal of 101289484781 is 187484982101.

Together with next prime (101289484817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58305829156 + 42983655625 = 241466^2 + 207325^2 .

It is a cyclic number.

It is not a de Polignac number, because 101289484781 - 2¹⁸ = 101289222637 is a prime.

It is a super-2 number, since 2×101289484781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101289484721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50644742390 + 50644742391.

It is an arithmetic number, because the mean of its divisors is an integer number (50644742391).

Almost surely, 2^101289484781 is an apocalyptic number.

It is an amenable number.

101289484781 is a deficient number, since it is larger than the sum of its proper divisors (1).

101289484781 is an equidigital number, since it uses as much as digits as its factorization.

101289484781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 53.

The spelling of 101289484781 in words is "one hundred one billion, two hundred eighty-nine million, four hundred eighty-four thousand, seven hundred eighty-one".