2343402012221 has 4 divisors (see below), whose sum is σ = 2366604012444. Its totient is φ = 2320200012000.

The previous prime is 2343402012191. The next prime is 2343402012223. The reversal of 2343402012221 is 1222102043432.

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 1981377172996 + 362024839225 = 1407614^2 + 601685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2343402012221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2343402012223) 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, 11600999960 + ... + 11601000161.

It is an arithmetic number, because the mean of its divisors is an integer number (591651003111).

Almost surely, 2^{2343402012221} is an apocalyptic number.

It is an amenable number.

2343402012221 is a deficient number, since it is larger than the sum of its proper divisors (23202000223).

2343402012221 is a wasteful number, since it uses less digits than its factorization.

2343402012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23202000222.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 2343402012221 its reverse (1222102043432), we get a palindrome (3565504055653).

The spelling of 2343402012221 in words is "two trillion, three hundred forty-three billion, four hundred two million, twelve thousand, two hundred twenty-one".