203011312212 has 36 divisors (see below), whose sum is σ = 515826400180. Its totient is φ = 67319811072.

The previous prime is 203011312151. The next prime is 203011312219. The reversal of 203011312212 is 212213110302.

203011312212 is a `hidden beast` number, since 20 + 301 + 131 + 2 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17892807696 + 185118504516 = 133764^2 + 430254^2 .

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203011312219) 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, 14602387 + ... + 14616282.

Almost surely, 2^203011312212 is an apocalyptic number.

It is an amenable number.

203011312212 is an abundant number, since it is smaller than the sum of its proper divisors (312815087968).

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

203011312212 is a wasteful number, since it uses less digits than its factorization.

203011312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29218872 (or 29218867 counting only the distinct ones).

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

Adding to 203011312212 its reverse (212213110302), we get a palindrome (415224422514).

The spelling of 203011312212 in words is "two hundred three billion, eleven million, three hundred twelve thousand, two hundred twelve".