203221311012 has 36 divisors (see below), whose sum is σ = 513712612140. Its totient is φ = 67738551552.

The previous prime is 203221310959. The next prime is 203221311019. The reversal of 203221311012 is 210113122302.

203221311012 is a `hidden beast` number, since 20 + 322 + 1 + 311 + 0 + 12 = 666.

203221311012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 131816920356 + 71404390656 = 363066^2 + 267216^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (203221311019) 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, 1951168 + ... + 2052680.

Almost surely, 2^203221311012 is an apocalyptic number.

It is an amenable number.

203221311012 is an abundant number, since it is smaller than the sum of its proper divisors (310491301128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203221311012 is a wasteful number, since it uses less digits than its factorization.

203221311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157132 (or 157127 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 203221311012 its reverse (210113122302), we get a palindrome (413334433314).

The spelling of 203221311012 in words is "two hundred three billion, two hundred twenty-one million, three hundred eleven thousand, twelve".