312121112003 has 2 divisors, whose sum is σ = 312121112004. Its totient is φ = 312121112002.

The previous prime is 312121111999. The next prime is 312121112063. The reversal of 312121112003 is 300211121213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312121112003 - 2² = 312121111999 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (312121112063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060556001 + 156060556002.

It is an arithmetic number, because the mean of its divisors is an integer number (156060556002).

Almost surely, 2^312121112003 is an apocalyptic number.

312121112003 is a deficient number, since it is larger than the sum of its proper divisors (1).

312121112003 is an equidigital number, since it uses as much as digits as its factorization.

312121112003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 312121112003 its reverse (300211121213), we get a palindrome (612332233216).

The spelling of 312121112003 in words is "three hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, three".