1100203021013 has 4 divisors (see below), whose sum is σ = 1100208252108. Its totient is φ = 1100197789920.

The previous prime is 1100203021007. The next prime is 1100203021019. The reversal of 1100203021013 is 3101203020011.

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

It is an interprime number because it is at equal distance from previous prime (1100203021007) and next prime (1100203021019).

It can be written as a sum of positive squares in 2 ways, for example, as 624134760484 + 476068260529 = 790022^2 + 689977^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100203021013 - 2¹⁴ = 1100203004629 is a prime.

It is a super-2 number, since 2×1100203021013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100203021019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2286248 + ... + 2725313.

It is an arithmetic number, because the mean of its divisors is an integer number (275052063027).

Almost surely, 2^{1100203021013} is an apocalyptic number.

It is an amenable number.

1100203021013 is a deficient number, since it is larger than the sum of its proper divisors (5231095).

1100203021013 is an equidigital number, since it uses as much as digits as its factorization.

1100203021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231094.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 1100203021013 its reverse (3101203020011), we get a palindrome (4201406041024).

The spelling of 1100203021013 in words is "one trillion, one hundred billion, two hundred three million, twenty-one thousand, thirteen".