211121111210203 has 4 divisors (see below), whose sum is σ = 214699435129080. Its totient is φ = 207542787291328.

The previous prime is 211121111210201. The next prime is 211121111210209. The reversal of 211121111210203 is 302012111121112.

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 211121111210203 - 2¹ = 211121111210201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121111210201) 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, 1789161959350 + ... + 1789161959467.

It is an arithmetic number, because the mean of its divisors is an integer number (53674858782270).

Almost surely, 2^{211121111210203} is an apocalyptic number.

211121111210203 is a deficient number, since it is larger than the sum of its proper divisors (3578323918877).

211121111210203 is an equidigital number, since it uses as much as digits as its factorization.

211121111210203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578323918876.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 211121111210203 its reverse (302012111121112), we get a palindrome (513133222331315).

The spelling of 211121111210203 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred eleven million, two hundred ten thousand, two hundred three".