1340421211 has 2 divisors, whose sum is σ = 1340421212. Its totient is φ = 1340421210.

The previous prime is 1340421167. The next prime is 1340421217. The reversal of 1340421211 is 1121240431.

It is a strong prime.

It is an emirp because it is prime and its reverse (1121240431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340421211 - 2²¹ = 1338324059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340421217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670210605 + 670210606.

It is an arithmetic number, because the mean of its divisors is an integer number (670210606).

Almost surely, 2^1340421211 is an apocalyptic number.

1340421211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340421211 is an equidigital number, since it uses as much as digits as its factorization.

1340421211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1340421211 is about 36611.7632872278. The cubic root of 1340421211 is about 1102.5892752885.

Adding to 1340421211 its reverse (1121240431), we get a palindrome (2461661642).

The spelling of 1340421211 in words is "one billion, three hundred forty million, four hundred twenty-one thousand, two hundred eleven".