211020203 has 4 divisors (see below), whose sum is σ = 211099608. Its totient is φ = 210940800.

The previous prime is 211020163. The next prime is 211020233. The reversal of 211020203 is 302020112.

It is a happy number.

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 211020203 - 2¹⁸ = 210758059 is a prime.

It is a super-2 number, since 2×211020203² = 89059052148322418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211020233) 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, 35573 + ... + 41078.

It is an arithmetic number, because the mean of its divisors is an integer number (52774902).

Almost surely, 2^211020203 is an apocalyptic number.

211020203 is a deficient number, since it is larger than the sum of its proper divisors (79405).

211020203 is an equidigital number, since it uses as much as digits as its factorization.

211020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79404.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 211020203 is about 14526.5344456274. The cubic root of 211020203 is about 595.3531815550.

Adding to 211020203 its reverse (302020112), we get a palindrome (513040315).

Subtracting 211020203 from its reverse (302020112), we obtain a palindrome (90999909).

The spelling of 211020203 in words is "two hundred eleven million, twenty thousand, two hundred three".