11303220121 has 4 divisors (see below), whose sum is σ = 11330197200. Its totient is φ = 11276243044.

The previous prime is 11303220079. The next prime is 11303220139. The reversal of 11303220121 is 12102230311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11303220121 - 2¹⁵ = 11303187353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11303220095 and 11303220104.

It is not an unprimeable number, because it can be changed into a prime (11303220191) 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, 13487911 + ... + 13488748.

It is an arithmetic number, because the mean of its divisors is an integer number (2832549300).

Almost surely, 2^11303220121 is an apocalyptic number.

It is an amenable number.

11303220121 is a deficient number, since it is larger than the sum of its proper divisors (26977079).

11303220121 is an equidigital number, since it uses as much as digits as its factorization.

11303220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26977078.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11303220121 its reverse (12102230311), we get a palindrome (23405450432).

The spelling of 11303220121 in words is "eleven billion, three hundred three million, two hundred twenty thousand, one hundred twenty-one".