1343120221 has 2 divisors, whose sum is σ = 1343120222. Its totient is φ = 1343120220.

The previous prime is 1343120201. The next prime is 1343120231. The reversal of 1343120221 is 1220213431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1342856025 + 264196 = 36645^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343120221 - 2¹¹ = 1343118173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343120201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671560110 + 671560111.

It is an arithmetic number, because the mean of its divisors is an integer number (671560111).

Almost surely, 2^1343120221 is an apocalyptic number.

It is an amenable number.

1343120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343120221 is an equidigital number, since it uses as much as digits as its factorization.

1343120221 is an evil number, because the sum of its binary digits is even.

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

The square root of 1343120221 is about 36648.6046255516. The cubic root of 1343120221 is about 1103.3288200199.

Adding to 1343120221 its reverse (1220213431), we get a palindrome (2563333652).

The spelling of 1343120221 in words is "one billion, three hundred forty-three million, one hundred twenty thousand, two hundred twenty-one".