1343020221 has 12 divisors (see below), whose sum is σ = 1940427840. Its totient is φ = 895111560.

The previous prime is 1343020183. The next prime is 1343020241. The reversal of 1343020221 is 1220203431.

1343020221 is a `hidden beast` number, since 13 + 430 + 2 + 0 + 221 = 666.

It is not a de Polignac number, because 1343020221 - 2⁹ = 1343019709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1343020194 and 1343020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343020241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20970 + ... + 55908.

It is an arithmetic number, because the mean of its divisors is an integer number (161702320).

Almost surely, 2^1343020221 is an apocalyptic number.

It is an amenable number.

1343020221 is a deficient number, since it is larger than the sum of its proper divisors (597407619).

1343020221 is a wasteful number, since it uses less digits than its factorization.

1343020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39216 (or 39213 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1343020221 is about 36647.2402917327. The cubic root of 1343020221 is about 1103.3014371099.

Adding to 1343020221 its reverse (1220203431), we get a palindrome (2563223652).

The spelling of 1343020221 in words is "one billion, three hundred forty-three million, twenty thousand, two hundred twenty-one".