1343220221 has 16 divisors (see below), whose sum is σ = 1579403904. Its totient is φ = 1118582784.

The previous prime is 1343220187. The next prime is 1343220223. The reversal of 1343220221 is 1220223431.

It is a cyclic number.

It is not a de Polignac number, because 1343220221 - 2⁶ = 1343220157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1343220193 and 1343220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343220223) 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, 14621 + ... + 53853.

It is an arithmetic number, because the mean of its divisors is an integer number (98712744).

Almost surely, 2^1343220221 is an apocalyptic number.

It is an amenable number.

1343220221 is a deficient number, since it is larger than the sum of its proper divisors (236183683).

1343220221 is an equidigital number, since it uses as much as digits as its factorization.

1343220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39380.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1343220221 is about 36649.9689085816. The cubic root of 1343220221 is about 1103.3562015707.

Adding to 1343220221 its reverse (1220223431), we get a palindrome (2563443652).

The spelling of 1343220221 in words is "one billion, three hundred forty-three million, two hundred twenty thousand, two hundred twenty-one".