203212117 has 2 divisors, whose sum is σ = 203212118. Its totient is φ = 203212116.

The previous prime is 203212111. The next prime is 203212133. The reversal of 203212117 is 711212302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111703761 + 91508356 = 10569^2 + 9566^2 .

It is a cyclic number.

It is not a de Polignac number, because 203212117 - 2²³ = 194823509 is a prime.

It is a super-3 number, since 3×203212117³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203212094 and 203212103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203212111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101606058 + 101606059.

It is an arithmetic number, because the mean of its divisors is an integer number (101606059).

Almost surely, 2^203212117 is an apocalyptic number.

It is an amenable number.

203212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

203212117 is an equidigital number, since it uses as much as digits as its factorization.

203212117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 203212117 is about 14255.2487526525. The cubic root of 203212117 is about 587.9176973442.

Adding to 203212117 its reverse (711212302), we get a palindrome (914424419).

The spelling of 203212117 in words is "two hundred three million, two hundred twelve thousand, one hundred seventeen".