212203111 has 4 divisors (see below), whose sum is σ = 212491000. Its totient is φ = 211915224.

The previous prime is 212203097. The next prime is 212203139. The reversal of 212203111 is 111302212.

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 212203111 - 2⁷ = 212202983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212203091 and 212203100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212203141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142836 + ... + 144313.

It is an arithmetic number, because the mean of its divisors is an integer number (53122750).

Almost surely, 2^212203111 is an apocalyptic number.

212203111 is a deficient number, since it is larger than the sum of its proper divisors (287889).

212203111 is an equidigital number, since it uses as much as digits as its factorization.

212203111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287888.

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

The square root of 212203111 is about 14567.1929691344. The cubic root of 212203111 is about 596.4635589637.

Adding to 212203111 its reverse (111302212), we get a palindrome (323505323).

The spelling of 212203111 in words is "two hundred twelve million, two hundred three thousand, one hundred eleven".