1003103121011 has 4 divisors (see below), whose sum is σ = 1003205456952. Its totient is φ = 1003000785072.

The previous prime is 1003103120989. The next prime is 1003103121047. The reversal of 1003103121011 is 1101213013001.

It is a happy number.

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 1003103121011 - 2³⁰ = 1002029379187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003103121511) 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, 51153266 + ... + 51172871.

It is an arithmetic number, because the mean of its divisors is an integer number (250801364238).

Almost surely, 2^{1003103121011} is an apocalyptic number.

1003103121011 is a deficient number, since it is larger than the sum of its proper divisors (102335941).

1003103121011 is an equidigital number, since it uses as much as digits as its factorization.

1003103121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102335940.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 1003103121011 its reverse (1101213013001), we get a palindrome (2104316134012).

The spelling of 1003103121011 in words is "one trillion, three billion, one hundred three million, one hundred twenty-one thousand, eleven".