251113122003 has 16 divisors (see below), whose sum is σ = 336382674336. Its totient is φ = 166627760640.

The previous prime is 251113121969. The next prime is 251113122011. The reversal of 251113122003 is 300221311152.

251113122003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251113122003 - 2¹² = 251113117907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251113122053) 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 15 ways as a sum of consecutive naturals, for example, 428875 + ... + 828347.

It is an arithmetic number, because the mean of its divisors is an integer number (21023917146).

Almost surely, 2^251113122003 is an apocalyptic number.

251113122003 is a deficient number, since it is larger than the sum of its proper divisors (85269552333).

251113122003 is a wasteful number, since it uses less digits than its factorization.

251113122003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400454.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 251113122003 its reverse (300221311152), we get a palindrome (551334433155).

The spelling of 251113122003 in words is "two hundred fifty-one billion, one hundred thirteen million, one hundred twenty-two thousand, three".