212100312103 has 4 divisors (see below), whose sum is σ = 212114088648. Its totient is φ = 212086535560.

The previous prime is 212100312029. The next prime is 212100312139. The reversal of 212100312103 is 301213001212.

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 212100312103 - 2¹³ = 212100303911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100312173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6865153 + ... + 6895978.

It is an arithmetic number, because the mean of its divisors is an integer number (53028522162).

Almost surely, 2^212100312103 is an apocalyptic number.

212100312103 is a deficient number, since it is larger than the sum of its proper divisors (13776545).

212100312103 is a wasteful number, since it uses less digits than its factorization.

212100312103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13776544.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212100312103 its reverse (301213001212), we get a palindrome (513313313315).

The spelling of 212100312103 in words is "two hundred twelve billion, one hundred million, three hundred twelve thousand, one hundred three".