10343021221 has 16 divisors (see below), whose sum is σ = 11863681200. Its totient is φ = 8985759744.

The previous prime is 10343021209. The next prime is 10343021263. The reversal of 10343021221 is 12212034301.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4530636100 + 5812385121 = 67310^2 + 76239^2 .

It is not a de Polignac number, because 10343021221 - 2⁵ = 10343021189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10343021021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101116 + ... + 175813.

It is an arithmetic number, because the mean of its divisors is an integer number (741480075).

Almost surely, 2^10343021221 is an apocalyptic number.

It is an amenable number.

10343021221 is a deficient number, since it is larger than the sum of its proper divisors (1520659979).

10343021221 is an equidigital number, since it uses as much as digits as its factorization.

10343021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276985 (or 276959 counting only the distinct ones).

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

Adding to 10343021221 its reverse (12212034301), we get a palindrome (22555055522).

The spelling of 10343021221 in words is "ten billion, three hundred forty-three million, twenty-one thousand, two hundred twenty-one".