203312120251 has 2 divisors, whose sum is σ = 203312120252. Its totient is φ = 203312120250.

The previous prime is 203312120227. The next prime is 203312120267. The reversal of 203312120251 is 152021213302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203312120251 is a prime.

It is not a weakly prime, because it can be changed into another prime (203312120951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101656060125 + 101656060126.

It is an arithmetic number, because the mean of its divisors is an integer number (101656060126).

Almost surely, 2^203312120251 is an apocalyptic number.

203312120251 is a deficient number, since it is larger than the sum of its proper divisors (1).

203312120251 is an equidigital number, since it uses as much as digits as its factorization.

203312120251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 203312120251 its reverse (152021213302), we get a palindrome (355333333553).

The spelling of 203312120251 in words is "two hundred three billion, three hundred twelve million, one hundred twenty thousand, two hundred fifty-one".