211020120103 has 4 divisors (see below), whose sum is σ = 227252437048. Its totient is φ = 194787803160.

The previous prime is 211020120053. The next prime is 211020120127. The reversal of 211020120103 is 301021020112.

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 211020120103 - 2⁹ = 211020119591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16232316931 = 211020120103 / (2 + 1 + 1 + 0 + 2 + 0 + 1 + 2 + 0 + 1 + 0 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020120173) 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, 8116158453 + ... + 8116158478.

It is an arithmetic number, because the mean of its divisors is an integer number (56813109262).

Almost surely, 2^211020120103 is an apocalyptic number.

211020120103 is a deficient number, since it is larger than the sum of its proper divisors (16232316945).

211020120103 is a wasteful number, since it uses less digits than its factorization.

211020120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16232316944.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 211020120103 its reverse (301021020112), we get a palindrome (512041140215).

Subtracting 211020120103 from its reverse (301021020112), we obtain a palindrome (90000900009).

The spelling of 211020120103 in words is "two hundred eleven billion, twenty million, one hundred twenty thousand, one hundred three".