101115139 has 4 divisors (see below), whose sum is σ = 101154160. Its totient is φ = 101076120.

The previous prime is 101115137. The next prime is 101115173. The reversal of 101115139 is 931511101.

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 101115139 - 2¹ = 101115137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101115137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15324 + ... + 20905.

It is an arithmetic number, because the mean of its divisors is an integer number (25288540).

Almost surely, 2^101115139 is an apocalyptic number.

101115139 is a deficient number, since it is larger than the sum of its proper divisors (39021).

101115139 is an equidigital number, since it uses as much as digits as its factorization.

101115139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39020.

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

The square root of 101115139 is about 10055.6023688290. The cubic root of 101115139 is about 465.8778484012.

The spelling of 101115139 in words is "one hundred one million, one hundred fifteen thousand, one hundred thirty-nine".