101188121 has 4 divisors (see below), whose sum is σ = 101518032. Its totient is φ = 100858212.

The previous prime is 101188111. The next prime is 101188141. The reversal of 101188121 is 121881101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121881101 = 83 ⋅1468447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101188121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101188111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164495 + ... + 165108.

It is an arithmetic number, because the mean of its divisors is an integer number (25379508).

Almost surely, 2^101188121 is an apocalyptic number.

It is an amenable number.

101188121 is a deficient number, since it is larger than the sum of its proper divisors (329911).

101188121 is an equidigital number, since it uses as much as digits as its factorization.

101188121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329910.

The product of its (nonzero) digits is 128, while the sum is 23.

The square root of 101188121 is about 10059.2306365845. The cubic root of 101188121 is about 465.9899071905.

The spelling of 101188121 in words is "one hundred one million, one hundred eighty-eight thousand, one hundred twenty-one".