12310000221 has 4 divisors (see below), whose sum is σ = 16413333632. Its totient is φ = 8206666812.

The previous prime is 12310000207. The next prime is 12310000259. The reversal of 12310000221 is 12200001321.

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 not a de Polignac number, because 12310000221 - 2¹³ = 12309992029 is a prime.

It is a super-2 number, since 2×12310000221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12310000197 and 12310000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310000921) 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, 2051666701 + ... + 2051666706.

It is an arithmetic number, because the mean of its divisors is an integer number (4103333408).

Almost surely, 2^12310000221 is an apocalyptic number.

It is an amenable number.

12310000221 is a deficient number, since it is larger than the sum of its proper divisors (4103333411).

12310000221 is an equidigital number, since it uses as much as digits as its factorization.

12310000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103333410.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12310000221 its reverse (12200001321), we get a palindrome (24510001542).

The spelling of 12310000221 in words is "twelve billion, three hundred ten million, two hundred twenty-one", and thus it is an aban number.