1003121401 has 4 divisors (see below), whose sum is σ = 1003766400. Its totient is φ = 1002476404.

The previous prime is 1003121377. The next prime is 1003121419. The reversal of 1003121401 is 1041213001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1003121401 - 2⁵ = 1003121369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003121461) 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 3 ways as a sum of consecutive naturals, for example, 320161 + ... + 323278.

It is an arithmetic number, because the mean of its divisors is an integer number (250941600).

Almost surely, 2^1003121401 is an apocalyptic number.

It is an amenable number.

1003121401 is a deficient number, since it is larger than the sum of its proper divisors (644999).

1003121401 is an equidigital number, since it uses as much as digits as its factorization.

1003121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644998.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1003121401 is about 31672.0918317689. The cubic root of 1003121401 is about 1001.0393863018.

Adding to 1003121401 its reverse (1041213001), we get a palindrome (2044334402).

The spelling of 1003121401 in words is "one billion, three million, one hundred twenty-one thousand, four hundred one".