106021 has 4 divisors (see below), whose sum is σ = 107212. Its totient is φ = 104832.

The previous prime is 106019. The next prime is 106031. The reversal of 106021 is 120601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120601 = 13 ⋅9277.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 22500 = 289^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 106021 - 2¹ = 106019 is a prime.

It is a super-2 number, since 2×106021² = 22480904882, which contains 22 as substring.

It is a Duffinian number.

106021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 105989 and 106007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106031) 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, 450 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (26803).

2¹⁰⁶⁰²¹ is an apocalyptic number.

It is an amenable number.

106021 is a deficient number, since it is larger than the sum of its proper divisors (1191).

106021 is an equidigital number, since it uses as much as digits as its factorization.

106021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 106021 is about 325.6086608185. The cubic root of 106021 is about 47.3293600227.

Adding to 106021 its reverse (120601), we get a palindrome (226622).

It can be divided in two parts, 1060 and 21, that added together give a triangular number (1081 = T₄₆).

The spelling of 106021 in words is "one hundred six thousand, twenty-one".