10043213221 has 4 divisors (see below), whose sum is σ = 10048565772. Its totient is φ = 10037860672.

The previous prime is 10043213207. The next prime is 10043213263. The reversal of 10043213221 is 12231234001.

It is a happy number.

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 8792812900 + 1250400321 = 93770^2 + 35361^2 .

It is a cyclic number.

It is not a de Polignac number, because 10043213221 - 2⁷ = 10043213093 is a prime.

It is a super-2 number, since 2×10043213221² (a number of 21 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 (10043283221) 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, 2673460 + ... + 2677213.

It is an arithmetic number, because the mean of its divisors is an integer number (2512141443).

Almost surely, 2^10043213221 is an apocalyptic number.

It is an amenable number.

10043213221 is a deficient number, since it is larger than the sum of its proper divisors (5352551).

10043213221 is an equidigital number, since it uses as much as digits as its factorization.

10043213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352550.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 10043213221 its reverse (12231234001), we get a palindrome (22274447222).

The spelling of 10043213221 in words is "ten billion, forty-three million, two hundred thirteen thousand, two hundred twenty-one".