212021103103 has 4 divisors (see below), whose sum is σ = 213546434920. Its totient is φ = 210495771288.

The previous prime is 212021103031. The next prime is 212021103127. The reversal of 212021103103 is 301301120212.

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 212021103103 - 2¹³ = 212021094911 is a prime.

It is a super-2 number, since 2×212021103103² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021100103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762665700 + ... + 762665977.

It is an arithmetic number, because the mean of its divisors is an integer number (53386608730).

Almost surely, 2^212021103103 is an apocalyptic number.

212021103103 is a deficient number, since it is larger than the sum of its proper divisors (1525331817).

212021103103 is a wasteful number, since it uses less digits than its factorization.

212021103103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525331816.

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

Adding to 212021103103 its reverse (301301120212), we get a palindrome (513322223315).

The spelling of 212021103103 in words is "two hundred twelve billion, twenty-one million, one hundred three thousand, one hundred three".