11210031221 has 4 divisors (see below), whose sum is σ = 11210585472. Its totient is φ = 11209476972.

The previous prime is 11210031199. The next prime is 11210031227. The reversal of 11210031221 is 12213001211.

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 a de Polignac number, because none of the positive numbers 2^k-11210031221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11210031196 and 11210031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210031227) 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, 245591 + ... + 287636.

It is an arithmetic number, because the mean of its divisors is an integer number (2802646368).

Almost surely, 2^11210031221 is an apocalyptic number.

It is an amenable number.

11210031221 is a deficient number, since it is larger than the sum of its proper divisors (554251).

11210031221 is an equidigital number, since it uses as much as digits as its factorization.

11210031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554250.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11210031221 its reverse (12213001211), we get a palindrome (23423032432).

The spelling of 11210031221 in words is "eleven billion, two hundred ten million, thirty-one thousand, two hundred twenty-one".