106213321 has 4 divisors (see below), whose sum is σ = 107668372. Its totient is φ = 104758272.

The previous prime is 106213319. The next prime is 106213337. The reversal of 106213321 is 123312601.

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 35569296 + 70644025 = 5964^2 + 8405^2 .

It is a cyclic number.

It is not a de Polignac number, because 106213321 - 2¹ = 106213319 is a prime.

It is a super-2 number, since 2×106213321² = 22562539115698082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106213361) 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, 727416 + ... + 727561.

It is an arithmetic number, because the mean of its divisors is an integer number (26917093).

Almost surely, 2^106213321 is an apocalyptic number.

It is an amenable number.

106213321 is a deficient number, since it is larger than the sum of its proper divisors (1455051).

106213321 is an equidigital number, since it uses as much as digits as its factorization.

106213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455050.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 106213321 is about 10305.9847176289. The cubic root of 106213321 is about 473.5796105921.

Adding to 106213321 its reverse (123312601), we get a palindrome (229525922).

The spelling of 106213321 in words is "one hundred six million, two hundred thirteen thousand, three hundred twenty-one".