101842121 has 4 divisors (see below), whose sum is σ = 107832852. Its totient is φ = 95851392.

The previous prime is 101842063. The next prime is 101842127. The reversal of 101842121 is 121248101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51998521 + 49843600 = 7211^2 + 7060^2 .

It is a cyclic number.

It is not a de Polignac number, because 101842121 - 2⁶ = 101842057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101842093 and 101842102.

It is not an unprimeable number, because it can be changed into a prime (101842127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2995340 + ... + 2995373.

It is an arithmetic number, because the mean of its divisors is an integer number (26958213).

Almost surely, 2^101842121 is an apocalyptic number.

It is an amenable number.

101842121 is a deficient number, since it is larger than the sum of its proper divisors (5990731).

101842121 is an equidigital number, since it uses as much as digits as its factorization.

101842121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990730.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 101842121 is about 10091.6857362881. The cubic root of 101842121 is about 466.9916821467.

The spelling of 101842121 in words is "one hundred one million, eight hundred forty-two thousand, one hundred twenty-one".