106016221 has 4 divisors (see below), whose sum is σ = 107468572. Its totient is φ = 104563872.

The previous prime is 106016173. The next prime is 106016227. The reversal of 106016221 is 122610601.

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 35640900 + 70375321 = 5970^2 + 8389^2 .

It is a cyclic number.

It is not a de Polignac number, because 106016221 - 2⁷ = 106016093 is a prime.

It is a super-2 number, since 2×106016221² = 22478878230241682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106016227) 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, 726066 + ... + 726211.

It is an arithmetic number, because the mean of its divisors is an integer number (26867143).

Almost surely, 2^106016221 is an apocalyptic number.

It is an amenable number.

106016221 is a deficient number, since it is larger than the sum of its proper divisors (1452351).

106016221 is an equidigital number, since it uses as much as digits as its factorization.

106016221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452350.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 106016221 is about 10296.4178722505. The cubic root of 106016221 is about 473.2864887296.

Adding to 106016221 its reverse (122610601), we get a palindrome (228626822).

The spelling of 106016221 in words is "one hundred six million, sixteen thousand, two hundred twenty-one".