1003131121028 has 24 divisors (see below), whose sum is σ = 1825136293344. Its totient is φ = 482028782400.

The previous prime is 1003131121021. The next prime is 1003131121037. The reversal of 1003131121028 is 8201211313001.

It is a junction number, because it is equal to n+sod(n) for n = 1003131120994 and 1003131121012.

It is not an unprimeable number, because it can be changed into a prime (1003131121021) 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 7 ways as a sum of consecutive naturals, for example, 45635678 + ... + 45657653.

It is an arithmetic number, because the mean of its divisors is an integer number (76047345556).

Almost surely, 2^{1003131121028} is an apocalyptic number.

It is an amenable number.

1003131121028 is a deficient number, since it is larger than the sum of its proper divisors (822005172316).

1003131121028 is a wasteful number, since it uses less digits than its factorization.

1003131121028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91293443 (or 91293441 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 1003131121028 its reverse (8201211313001), we get a palindrome (9204342434029).

The spelling of 1003131121028 in words is "one trillion, three billion, one hundred thirty-one million, one hundred twenty-one thousand, twenty-eight".