1003012121 has 8 divisors (see below), whose sum is σ = 1082051784. Its totient is φ = 926199040.

The previous prime is 1003012117. The next prime is 1003012123. The reversal of 1003012121 is 1212103001.

It can be written as a sum of positive squares in 4 ways, for example, as 740928400 + 262083721 = 27220^2 + 16189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1003012121 - 2² = 1003012117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003012123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555710 + ... + 557511.

It is an arithmetic number, because the mean of its divisors is an integer number (135256473).

Almost surely, 2^1003012121 is an apocalyptic number.

It is an amenable number.

1003012121 is a deficient number, since it is larger than the sum of its proper divisors (79039663).

1003012121 is a wasteful number, since it uses less digits than its factorization.

1003012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113291.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1003012121 is about 31670.3666066561. The cubic root of 1003012121 is about 1001.0030339199.

Adding to 1003012121 its reverse (1212103001), we get a palindrome (2215115122).

The spelling of 1003012121 in words is "one billion, three million, twelve thousand, one hundred twenty-one".