106012021 has 4 divisors (see below), whose sum is σ = 106242444. Its totient is φ = 105781600.

The previous prime is 106012013. The next prime is 106012057. The reversal of 106012021 is 120210601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120210601 = 7 ⋅17172943.

It can be written as a sum of positive squares in 2 ways, for example, as 62583921 + 43428100 = 7911^2 + 6590^2 .

It is a cyclic number.

It is not a de Polignac number, because 106012021 - 2³ = 106012013 is a prime.

It is a super-2 number, since 2×106012021² = 22477097193008882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106011992 and 106012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106012121) 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, 114520 + ... + 115441.

It is an arithmetic number, because the mean of its divisors is an integer number (26560611).

Almost surely, 2^106012021 is an apocalyptic number.

It is an amenable number.

106012021 is a deficient number, since it is larger than the sum of its proper divisors (230423).

106012021 is an equidigital number, since it uses as much as digits as its factorization.

106012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230422.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 106012021 is about 10296.2139158042. The cubic root of 106012021 is about 473.2802386498.

Adding to 106012021 its reverse (120210601), we get a palindrome (226222622).

The spelling of 106012021 in words is "one hundred six million, twelve thousand, twenty-one".