101240155 has 4 divisors (see below), whose sum is σ = 121488192. Its totient is φ = 80992120.

The previous prime is 101240147. The next prime is 101240171. The reversal of 101240155 is 551042101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551042101 = 1277 ⋅431513.

It is not a de Polignac number, because 101240155 - 2³ = 101240147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 10124011 + ... + 10124020.

It is an arithmetic number, because the mean of its divisors is an integer number (30372048).

Almost surely, 2^101240155 is an apocalyptic number.

101240155 is a deficient number, since it is larger than the sum of its proper divisors (20248037).

101240155 is an equidigital number, since it uses as much as digits as its factorization.

101240155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20248036.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 101240155 is about 10061.8166848736. The cubic root of 101240155 is about 466.0697688829.

Adding to 101240155 its reverse (551042101), we get a palindrome (652282256).

The spelling of 101240155 in words is "one hundred one million, two hundred forty thousand, one hundred fifty-five".