10003121001 has 24 divisors (see below), whose sum is σ = 15349580064. Its totient is φ = 6506088480.

The previous prime is 10003120991. The next prime is 10003121021. The reversal of 10003121001 is 10012130001.

It is not a de Polignac number, because 10003121001 - 2¹³ = 10003112809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10003121021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 492051 + ... + 511976.

It is an arithmetic number, because the mean of its divisors is an integer number (639565836).

Almost surely, 2^10003121001 is an apocalyptic number.

It is an amenable number.

10003121001 is a deficient number, since it is larger than the sum of its proper divisors (5346459063).

10003121001 is an equidigital number, since it uses as much as digits as its factorization.

10003121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004083 (or 1004071 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 10003121001 its reverse (10012130001), we get a palindrome (20015251002).

The spelling of 10003121001 in words is "ten billion, three million, one hundred twenty-one thousand, one".