101011243 has 4 divisors (see below), whose sum is σ = 101162008. Its totient is φ = 100860480.

The previous prime is 101011189. The next prime is 101011259. The reversal of 101011243 is 342110101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101011243 - 2⁹ = 101010731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101011283) 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 in 3 ways as a sum of consecutive naturals, for example, 74373 + ... + 75718.

It is an arithmetic number, because the mean of its divisors is an integer number (25290502).

Almost surely, 2^101011243 is an apocalyptic number.

101011243 is a deficient number, since it is larger than the sum of its proper divisors (150765).

101011243 is an equidigital number, since it uses as much as digits as its factorization.

101011243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150764.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 101011243 is about 10050.4349657117. The cubic root of 101011243 is about 465.7182302574.

Adding to 101011243 its reverse (342110101), we get a palindrome (443121344).

The spelling of 101011243 in words is "one hundred one million, eleven thousand, two hundred forty-three".