212405103 has 24 divisors (see below), whose sum is σ = 310795056. Its totient is φ = 139776000.

The previous prime is 212405101. The next prime is 212405147. The reversal of 212405103 is 301504212.

It is not a de Polignac number, because 212405103 - 2¹ = 212405101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212405101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302653 + ... + 303353.

It is an arithmetic number, because the mean of its divisors is an integer number (12949794).

Almost surely, 2^212405103 is an apocalyptic number.

212405103 is a deficient number, since it is larger than the sum of its proper divisors (98389953).

212405103 is a wasteful number, since it uses less digits than its factorization.

212405103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 212405103 is about 14574.1244333922. The cubic root of 212405103 is about 596.6527529535.

Adding to 212405103 its reverse (301504212), we get a palindrome (513909315).

The spelling of 212405103 in words is "two hundred twelve million, four hundred five thousand, one hundred three".