213212103 has 16 divisors (see below), whose sum is σ = 313272960. Its totient is φ = 128155104.

The previous prime is 213212099. The next prime is 213212117. The reversal of 213212103 is 301212312.

It is not a de Polignac number, because 213212103 - 2² = 213212099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212303) 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 15 ways as a sum of consecutive naturals, for example, 61893 + ... + 65246.

It is an arithmetic number, because the mean of its divisors is an integer number (19579560).

Almost surely, 2^213212103 is an apocalyptic number.

213212103 is a deficient number, since it is larger than the sum of its proper divisors (100060857).

213212103 is a wasteful number, since it uses less digits than its factorization.

213212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127198.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213212103 is about 14601.7842402906. The cubic root of 213212103 is about 597.4074276381.

Adding to 213212103 its reverse (301212312), we get a palindrome (514424415).

The spelling of 213212103 in words is "two hundred thirteen million, two hundred twelve thousand, one hundred three".