251233121303 has 2 divisors, whose sum is σ = 251233121304. Its totient is φ = 251233121302.

The previous prime is 251233121267. The next prime is 251233121329. The reversal of 251233121303 is 303121332152.

It is an a-pointer prime, because the next prime (251233121329) can be obtained adding 251233121303 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251233121303 - 2⁶ = 251233121239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251233121353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125616560651 + 125616560652.

It is an arithmetic number, because the mean of its divisors is an integer number (125616560652).

Almost surely, 2^251233121303 is an apocalyptic number.

251233121303 is a deficient number, since it is larger than the sum of its proper divisors (1).

251233121303 is an equidigital number, since it uses as much as digits as its factorization.

251233121303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 251233121303 its reverse (303121332152), we get a palindrome (554354453455).

The spelling of 251233121303 in words is "two hundred fifty-one billion, two hundred thirty-three million, one hundred twenty-one thousand, three hundred three".