2312210221 has 8 divisors (see below), whose sum is σ = 2327750424. Its totient is φ = 2296695360.

The previous prime is 2312210209. The next prime is 2312210231. The reversal of 2312210221 is 1220122132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1988714025 + 323496196 = 44595^2 + 17986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2312210221 - 2⁷ = 2312210093 is a prime.

It is a super-2 number, since 2×2312210221² = 10692632212193737682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312210195 and 2312210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312210231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198655 + ... + 209971.

It is an arithmetic number, because the mean of its divisors is an integer number (290968803).

Almost surely, 2^2312210221 is an apocalyptic number.

It is an amenable number.

2312210221 is a deficient number, since it is larger than the sum of its proper divisors (15540203).

2312210221 is a wasteful number, since it uses less digits than its factorization.

2312210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12671.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2312210221 is about 48085.4470812116. The cubic root of 2312210221 is about 1322.3378795771.

Adding to 2312210221 its reverse (1220122132), we get a palindrome (3532332353).

The spelling of 2312210221 in words is "two billion, three hundred twelve million, two hundred ten thousand, two hundred twenty-one".