113210211221 has 4 divisors (see below), whose sum is σ = 113578974432. Its totient is φ = 112841448012.

The previous prime is 113210211209. The next prime is 113210211241. The reversal of 113210211221 is 122112012311.

It is a happy number.

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-113210211221 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 113210211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113210211241) 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, 184381145 + ... + 184381758.

It is an arithmetic number, because the mean of its divisors is an integer number (28394743608).

Almost surely, 2^113210211221 is an apocalyptic number.

It is an amenable number.

113210211221 is a deficient number, since it is larger than the sum of its proper divisors (368763211).

113210211221 is an equidigital number, since it uses as much as digits as its factorization.

113210211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368763210.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 113210211221 its reverse (122112012311), we get a palindrome (235322223532).

The spelling of 113210211221 in words is "one hundred thirteen billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".