1340420420111 has 4 divisors (see below), whose sum is σ = 1345190599824. Its totient is φ = 1335650240400.

The previous prime is 1340420420071. The next prime is 1340420420167. The reversal of 1340420420111 is 1110240240431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340420420111 - 2⁶ = 1340420420047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340420320111) 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, 2385089435 + ... + 2385089996.

It is an arithmetic number, because the mean of its divisors is an integer number (336297649956).

Almost surely, 2^{1340420420111} is an apocalyptic number.

1340420420111 is a deficient number, since it is larger than the sum of its proper divisors (4770179713).

1340420420111 is an equidigital number, since it uses as much as digits as its factorization.

1340420420111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770179712.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1340420420111 its reverse (1110240240431), we get a palindrome (2450660660542).

The spelling of 1340420420111 in words is "one trillion, three hundred forty billion, four hundred twenty million, four hundred twenty thousand, one hundred eleven".