101044021 has 4 divisors (see below), whose sum is σ = 108816652. Its totient is φ = 93271392.

The previous prime is 101044019. The next prime is 101044051. The reversal of 101044021 is 120440101.

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 6682225 + 94361796 = 2585^2 + 9714^2 .

It is a cyclic number.

It is not a de Polignac number, because 101044021 - 2¹ = 101044019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 7772617 = 101044021 / (1 + 0 + 1 + 0 + 4 + 4 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101043992 and 101044010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101044001) 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, 3886296 + ... + 3886321.

It is an arithmetic number, because the mean of its divisors is an integer number (27204163).

Almost surely, 2^101044021 is an apocalyptic number.

It is an amenable number.

101044021 is a deficient number, since it is larger than the sum of its proper divisors (7772631).

101044021 is an equidigital number, since it uses as much as digits as its factorization.

101044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772630.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 101044021 is about 10052.0655091379. The cubic root of 101044021 is about 465.7685997700.

Adding to 101044021 its reverse (120440101), we get a palindrome (221484122).

The spelling of 101044021 in words is "one hundred one million, forty-four thousand, twenty-one".