203212212109 has 8 divisors (see below), whose sum is σ = 206197775672. Its totient is φ = 200232103680.

The previous prime is 203212212101. The next prime is 203212212127. The reversal of 203212212109 is 901212212302.

It can be written as a sum of positive squares in 4 ways, for example, as 9603412009 + 193608800100 = 97997^2 + 440010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203212212109 - 2³ = 203212212101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203212212101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288704 + ... + 1437769.

It is an arithmetic number, because the mean of its divisors is an integer number (25774721959).

Almost surely, 2^203212212109 is an apocalyptic number.

It is an amenable number.

203212212109 is a deficient number, since it is larger than the sum of its proper divisors (2985563563).

203212212109 is a wasteful number, since it uses less digits than its factorization.

203212212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727567.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 203212212109 in words is "two hundred three billion, two hundred twelve million, two hundred twelve thousand, one hundred nine".