106212021 has 8 divisors (see below), whose sum is σ = 144909600. Its totient is φ = 69161232.

The previous prime is 106212019. The next prime is 106212031. The reversal of 106212021 is 120212601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 106212021 - 2¹ = 106212019 is a prime.

It is a super-2 number, since 2×106212021² = 22561986809808882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106212031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411546 + ... + 411803.

It is an arithmetic number, because the mean of its divisors is an integer number (18113700).

Almost surely, 2^106212021 is an apocalyptic number.

It is an amenable number.

106212021 is a deficient number, since it is larger than the sum of its proper divisors (38697579).

106212021 is an equidigital number, since it uses as much as digits as its factorization.

106212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823395.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 106212021 is about 10305.9216472861. The cubic root of 106212021 is about 473.5776784552.

Adding to 106212021 its reverse (120212601), we get a palindrome (226424622).

The spelling of 106212021 in words is "one hundred six million, two hundred twelve thousand, twenty-one".