106821203 has 4 divisors (see below), whose sum is σ = 107819640. Its totient is φ = 105822768.

The previous prime is 106821191. The next prime is 106821233. The reversal of 106821203 is 302128601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302128601 = 227 ⋅1330963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106821203 is a prime.

It is a super-2 number, since 2×106821203² = 22821538820734418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106821233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499058 + ... + 499271.

It is an arithmetic number, because the mean of its divisors is an integer number (26954910).

Almost surely, 2^106821203 is an apocalyptic number.

106821203 is a deficient number, since it is larger than the sum of its proper divisors (998437).

106821203 is an equidigital number, since it uses as much as digits as its factorization.

106821203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998436.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 106821203 is about 10335.4343401717. The cubic root of 106821203 is about 474.4813589375.

Adding to 106821203 its reverse (302128601), we get a palindrome (408949804).

The spelling of 106821203 in words is "one hundred six million, eight hundred twenty-one thousand, two hundred three".