11310711221 has 4 divisors (see below), whose sum is σ = 11310944832. Its totient is φ = 11310477612.

The previous prime is 11310711193. The next prime is 11310711239. The reversal of 11310711221 is 12211701311.

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: 12211701311 = 2521 ⋅4843991.

It is a cyclic number.

It is not a de Polignac number, because 11310711221 - 2¹⁸ = 11310449077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11310711193 and 11310711202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11310719221) 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, 14045 + ... + 151058.

It is an arithmetic number, because the mean of its divisors is an integer number (2827736208).

Almost surely, 2^11310711221 is an apocalyptic number.

It is an amenable number.

11310711221 is a deficient number, since it is larger than the sum of its proper divisors (233611).

11310711221 is an equidigital number, since it uses as much as digits as its factorization.

11310711221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233610.

The product of its (nonzero) digits is 84, while the sum is 20.

The spelling of 11310711221 in words is "eleven billion, three hundred ten million, seven hundred eleven thousand, two hundred twenty-one".