203212112221 has 16 divisors (see below), whose sum is σ = 217960968960. Its totient is φ = 188988426880.

The previous prime is 203212112219. The next prime is 203212112269. The reversal of 203212112221 is 122211212302.

It is a cyclic number.

It is not a de Polignac number, because 203212112221 - 2¹ = 203212112219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203212112291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91441 + ... + 644038.

It is an arithmetic number, because the mean of its divisors is an integer number (13622560560).

Almost surely, 2^203212112221 is an apocalyptic number.

It is an amenable number.

203212112221 is a deficient number, since it is larger than the sum of its proper divisors (14748856739).

203212112221 is a wasteful number, since it uses less digits than its factorization.

203212112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735836.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 203212112221 its reverse (122211212302), we get a palindrome (325423324523).

The spelling of 203212112221 in words is "two hundred three billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-one".