11121020221503 has 4 divisors (see below), whose sum is σ = 14828026962008. Its totient is φ = 7414013481000.

The previous prime is 11121020221481. The next prime is 11121020221523. The reversal of 11121020221503 is 30512202012111.

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

It is not a de Polignac number, because 11121020221503 - 2⁸ = 11121020221247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121020221503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121020221523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853503370248 + ... + 1853503370253.

It is an arithmetic number, because the mean of its divisors is an integer number (3707006740502).

Almost surely, 2^{11121020221503} is an apocalyptic number.

11121020221503 is a deficient number, since it is larger than the sum of its proper divisors (3707006740505).

11121020221503 is an equidigital number, since it uses as much as digits as its factorization.

11121020221503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707006740504.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 11121020221503 its reverse (30512202012111), we get a palindrome (41633222233614).

The spelling of 11121020221503 in words is "eleven trillion, one hundred twenty-one billion, twenty million, two hundred twenty-one thousand, five hundred three".