1013121003 has 16 divisors (see below), whose sum is σ = 1418273280. Its totient is φ = 642386976.

The previous prime is 1013120993. The next prime is 1013121017. The reversal of 1013121003 is 3001213101.

It is not a de Polignac number, because 1013121003 - 2⁴ = 1013120987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1013121003.

It is not an unprimeable number, because it can be changed into a prime (1013021003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81075 + ... + 92732.

It is an arithmetic number, because the mean of its divisors is an integer number (88642080).

Almost surely, 2^1013121003 is an apocalyptic number.

1013121003 is a deficient number, since it is larger than the sum of its proper divisors (405152277).

1013121003 is a wasteful number, since it uses less digits than its factorization.

1013121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173906.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1013121003 is about 31829.5617783217. The cubic root of 1013121003 is about 1004.3546769293.

Adding to 1013121003 its reverse (3001213101), we get a palindrome (4014334104).

The spelling of 1013121003 in words is "one billion, thirteen million, one hundred twenty-one thousand, three".