10343212421 has 4 divisors (see below), whose sum is σ = 10343429772. Its totient is φ = 10342995072.

The previous prime is 10343212387. The next prime is 10343212423. The reversal of 10343212421 is 12421234301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12421234301 = 7 ⋅1774462043.

It can be written as a sum of positive squares in 2 ways, for example, as 2734139521 + 7609072900 = 52289^2 + 87230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10343212421 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 (10343212423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3116 + ... + 143861.

It is an arithmetic number, because the mean of its divisors is an integer number (2585857443).

Almost surely, 2^10343212421 is an apocalyptic number.

It is an amenable number.

10343212421 is a deficient number, since it is larger than the sum of its proper divisors (217351).

10343212421 is an equidigital number, since it uses as much as digits as its factorization.

10343212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217350.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 10343212421 its reverse (12421234301), we get a palindrome (22764446722).

The spelling of 10343212421 in words is "ten billion, three hundred forty-three million, two hundred twelve thousand, four hundred twenty-one".