4112312123221 has 4 divisors (see below), whose sum is σ = 4129375659244. Its totient is φ = 4095248587200.

The previous prime is 4112312123209. The next prime is 4112312123299. The reversal of 4112312123221 is 1223212132114.

4112312123221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2612703700996 + 1499608422225 = 1616386^2 + 1224585^2 .

It is a cyclic number.

It is not a de Polignac number, because 4112312123221 - 2¹¹ = 4112312121173 is a prime.

It is a super-2 number, since 2×4112312123221² (a number of 26 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 (4112312123201) 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, 8531767650 + ... + 8531768131.

It is an arithmetic number, because the mean of its divisors is an integer number (1032343914811).

Almost surely, 2^{4112312123221} is an apocalyptic number.

It is an amenable number.

4112312123221 is a deficient number, since it is larger than the sum of its proper divisors (17063536023).

4112312123221 is a wasteful number, since it uses less digits than its factorization.

4112312123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17063536022.

The product of its digits is 1152, while the sum is 25.

Adding to 4112312123221 its reverse (1223212132114), we get a palindrome (5335524255335).

The spelling of 4112312123221 in words is "four trillion, one hundred twelve billion, three hundred twelve million, one hundred twenty-three thousand, two hundred twenty-one".