203121313412 has 12 divisors (see below), whose sum is σ = 355652093916. Its totient is φ = 101506429440.

The previous prime is 203121313403. The next prime is 203121313453. The reversal of 203121313412 is 214313121302.

203121313412 is digitally balanced in base 2, 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 37289927236 + 165831386176 = 193106^2 + 407224^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13548389 + ... + 13563372.

It is an arithmetic number, because the mean of its divisors is an integer number (29637674493).

Almost surely, 2^203121313412 is an apocalyptic number.

It is an amenable number.

203121313412 is a deficient number, since it is larger than the sum of its proper divisors (152530780504).

203121313412 is a wasteful number, since it uses less digits than its factorization.

203121313412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27113638 (or 27113636 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 203121313412 its reverse (214313121302), we get a palindrome (417434434714).

The spelling of 203121313412 in words is "two hundred three billion, one hundred twenty-one million, three hundred thirteen thousand, four hundred twelve".