101115391 has 8 divisors (see below), whose sum is σ = 109049024. Its totient is φ = 93204000.

The previous prime is 101115353. The next prime is 101115401. The reversal of 101115391 is 193511101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101115391 - 2⁷ = 101115263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101115341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4585 + ... + 14941.

It is an arithmetic number, because the mean of its divisors is an integer number (13631128).

Almost surely, 2^101115391 is an apocalyptic number.

101115391 is a deficient number, since it is larger than the sum of its proper divisors (7933633).

101115391 is a wasteful number, since it uses less digits than its factorization.

101115391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11121.

The product of its (nonzero) digits is 135, while the sum is 22.

The square root of 101115391 is about 10055.6148991496. The cubic root of 101115391 is about 465.8782354225.

Adding to 101115391 its reverse (193511101), we get a palindrome (294626492).

The spelling of 101115391 in words is "one hundred one million, one hundred fifteen thousand, three hundred ninety-one".