1340103221 has 4 divisors (see below), whose sum is σ = 1342083372. Its totient is φ = 1338123072.

The previous prime is 1340103197. The next prime is 1340103223. The reversal of 1340103221 is 1223010431.

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 1027202500 + 312900721 = 32050^2 + 17689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340103221 - 2⁶ = 1340103157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340103223) 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, 989060 + ... + 990413.

It is an arithmetic number, because the mean of its divisors is an integer number (335520843).

Almost surely, 2^1340103221 is an apocalyptic number.

It is an amenable number.

1340103221 is a deficient number, since it is larger than the sum of its proper divisors (1980151).

1340103221 is an equidigital number, since it uses as much as digits as its factorization.

1340103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980150.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1340103221 is about 36607.4202997152. The cubic root of 1340103221 is about 1102.5020787938.

Adding to 1340103221 its reverse (1223010431), we get a palindrome (2563113652).

The spelling of 1340103221 in words is "one billion, three hundred forty million, one hundred three thousand, two hundred twenty-one".