2103121003 has 4 divisors (see below), whose sum is σ = 2170963648. Its totient is φ = 2035278360.

The previous prime is 2103120937. The next prime is 2103121043. The reversal of 2103121003 is 3001213012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2103121003 - 2²¹ = 2101023851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103121043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33921276 + ... + 33921337.

It is an arithmetic number, because the mean of its divisors is an integer number (542740912).

Almost surely, 2^2103121003 is an apocalyptic number.

2103121003 is a deficient number, since it is larger than the sum of its proper divisors (67842645).

2103121003 is an equidigital number, since it uses as much as digits as its factorization.

2103121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67842644.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2103121003 is about 45859.7972411567. The cubic root of 2103121003 is about 1281.2132464317.

Adding to 2103121003 its reverse (3001213012), we get a palindrome (5104334015).

It can be divided in two parts, 210 and 3121003, that added together give a palindrome (3121213).

The spelling of 2103121003 in words is "two billion, one hundred three million, one hundred twenty-one thousand, three".