213122003 has 4 divisors (see below), whose sum is σ = 213153480. Its totient is φ = 213090528.

The previous prime is 213121991. The next prime is 213122029. The reversal of 213122003 is 300221312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213122003 - 2⁶ = 213121939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213122033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950 + ... + 20667.

It is an arithmetic number, because the mean of its divisors is an integer number (53288370).

Almost surely, 2^213122003 is an apocalyptic number.

213122003 is a deficient number, since it is larger than the sum of its proper divisors (31477).

213122003 is an equidigital number, since it uses as much as digits as its factorization.

213122003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31476.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 213122003 is about 14598.6986748819. The cubic root of 213122003 is about 597.3232641966.

Adding to 213122003 its reverse (300221312), we get a palindrome (513343315).

The spelling of 213122003 in words is "two hundred thirteen million, one hundred twenty-two thousand, three".