106144221 has 4 divisors (see below), whose sum is σ = 141525632. Its totient is φ = 70762812.

The previous prime is 106144193. The next prime is 106144229. The reversal of 106144221 is 122441601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122441601 = 3 ⋅40813867.

It is not a de Polignac number, because 106144221 - 2¹⁰ = 106143197 is a prime.

It is a super-2 number, since 2×106144221² = 22533191303393682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106144229) 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, 17690701 + ... + 17690706.

It is an arithmetic number, because the mean of its divisors is an integer number (35381408).

Almost surely, 2^106144221 is an apocalyptic number.

It is an amenable number.

106144221 is a deficient number, since it is larger than the sum of its proper divisors (35381411).

106144221 is an equidigital number, since it uses as much as digits as its factorization.

106144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35381410.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 106144221 is about 10302.6317511595. The cubic root of 106144221 is about 473.4768882281.

Adding to 106144221 its reverse (122441601), we get a palindrome (228585822).

The spelling of 106144221 in words is "one hundred six million, one hundred forty-four thousand, two hundred twenty-one".