11310023221 has 4 divisors (see below), whose sum is σ = 12925740832. Its totient is φ = 9694305612.

The previous prime is 11310023209. The next prime is 11310023251. The reversal of 11310023221 is 12232001311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12232001311 = 8821 ⋅1386691.

It is a cyclic number.

It is not a de Polignac number, because 11310023221 - 2⁵ = 11310023189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11310023195 and 11310023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11310023251) 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, 807858795 + ... + 807858808.

It is an arithmetic number, because the mean of its divisors is an integer number (3231435208).

Almost surely, 2^11310023221 is an apocalyptic number.

It is an amenable number.

11310023221 is a deficient number, since it is larger than the sum of its proper divisors (1615717611).

11310023221 is an equidigital number, since it uses as much as digits as its factorization.

11310023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615717610.

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

Adding to 11310023221 its reverse (12232001311), we get a palindrome (23542024532).

The spelling of 11310023221 in words is "eleven billion, three hundred ten million, twenty-three thousand, two hundred twenty-one".