2112312213221 has 8 divisors (see below), whose sum is σ = 2454987560640. Its totient is φ = 1779865980768.

The previous prime is 2112312213211. The next prime is 2112312213223. The reversal of 2112312213221 is 1223122132112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112312213221 is a prime.

It is a super-2 number, since 2×2112312213221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112312213223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2557278296 + ... + 2557279121.

It is an arithmetic number, because the mean of its divisors is an integer number (306873445080).

Almost surely, 2^{2112312213221} is an apocalyptic number.

It is an amenable number.

2112312213221 is a deficient number, since it is larger than the sum of its proper divisors (342675347419).

2112312213221 is an equidigital number, since it uses as much as digits as its factorization.

2112312213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114557483.

The product of its digits is 576, while the sum is 23.

Adding to 2112312213221 its reverse (1223122132112), we get a palindrome (3335434345333).

The spelling of 2112312213221 in words is "two trillion, one hundred twelve billion, three hundred twelve million, two hundred thirteen thousand, two hundred twenty-one".