212100403 has 8 divisors (see below), whose sum is σ = 220046400. Its totient is φ = 204196608.

The previous prime is 212100349. The next prime is 212100409. The reversal of 212100403 is 304001212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212100403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212100409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123 + ... + 20596.

It is an arithmetic number, because the mean of its divisors is an integer number (27505800).

Almost surely, 2^212100403 is an apocalyptic number.

212100403 is a deficient number, since it is larger than the sum of its proper divisors (7945997).

212100403 is a wasteful number, since it uses less digits than its factorization.

212100403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21101.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212100403 is about 14563.6672236082. The cubic root of 212100403 is about 596.3673123924.

Adding to 212100403 its reverse (304001212), we get a palindrome (516101615).

The spelling of 212100403 in words is "two hundred twelve million, one hundred thousand, four hundred three".