203212221111 has 12 divisors (see below), whose sum is σ = 293594152488. Its totient is φ = 135444634704.

The previous prime is 203212221077. The next prime is 203212221127. The reversal of 203212221111 is 111122212302.

It is not a de Polignac number, because 203212221111 - 2⁷ = 203212220983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203212221211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2472265 + ... + 2553138.

It is an arithmetic number, because the mean of its divisors is an integer number (24466179374).

Almost surely, 2^203212221111 is an apocalyptic number.

203212221111 is a deficient number, since it is larger than the sum of its proper divisors (90381931377).

203212221111 is a wasteful number, since it uses less digits than its factorization.

203212221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029902 (or 5029899 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 203212221111 its reverse (111122212302), we get a palindrome (314334433413).

The spelling of 203212221111 in words is "two hundred three billion, two hundred twelve million, two hundred twenty-one thousand, one hundred eleven".