312121003203 has 12 divisors (see below), whose sum is σ = 451555944528. Its totient is φ = 207750901680.

The previous prime is 312121003171. The next prime is 312121003217. The reversal of 312121003203 is 302300121213.

312121003203 is a `hidden beast` number, since 31 + 212 + 100 + 320 + 3 = 666.

It is not a de Polignac number, because 312121003203 - 2⁵ = 312121003171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312121003273) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 27474600 + ... + 27485957.

It is an arithmetic number, because the mean of its divisors is an integer number (37629662044).

Almost surely, 2^312121003203 is an apocalyptic number.

312121003203 is a deficient number, since it is larger than the sum of its proper divisors (139434941325).

312121003203 is a wasteful number, since it uses less digits than its factorization.

312121003203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54961194 (or 54961191 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 312121003203 its reverse (302300121213), we get a palindrome (614421124416).

The spelling of 312121003203 in words is "three hundred twelve billion, one hundred twenty-one million, three thousand, two hundred three".