101010101243 has 2 divisors, whose sum is σ = 101010101244. Its totient is φ = 101010101242.

The previous prime is 101010101189. The next prime is 101010101263. The reversal of 101010101243 is 342101010101.

It is a strong prime.

It is an emirp because it is prime and its reverse (342101010101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101010101243 is a prime.

It is a super-2 number, since 2×101010101243² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101010101263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505050621 + 50505050622.

It is an arithmetic number, because the mean of its divisors is an integer number (50505050622).

Almost surely, 2^101010101243 is an apocalyptic number.

101010101243 is a deficient number, since it is larger than the sum of its proper divisors (1).

101010101243 is an equidigital number, since it uses as much as digits as its factorization.

101010101243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 101010101243 its reverse (342101010101), we get a palindrome (443111111344).

The spelling of 101010101243 in words is "one hundred one billion, ten million, one hundred one thousand, two hundred forty-three".