1340222120405 has 12 divisors (see below), whose sum is σ = 1870840674540. Its totient is φ = 919009453824.

The previous prime is 1340222120401. The next prime is 1340222120449. The reversal of 1340222120405 is 5040212220431.

It can be written as a sum of positive squares in 2 ways, for example, as 411415767889 + 928806352516 = 641417^2 + 963746^2 .

It is not a de Polignac number, because 1340222120405 - 2² = 1340222120401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340222120401) 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, 2735146940 + ... + 2735147429.

It is an arithmetic number, because the mean of its divisors is an integer number (155903389545).

Almost surely, 2^{1340222120405} is an apocalyptic number.

It is an amenable number.

1340222120405 is a deficient number, since it is larger than the sum of its proper divisors (530618554135).

1340222120405 is an equidigital number, since it uses as much as digits as its factorization.

1340222120405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470294388 (or 5470294381 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 1340222120405 its reverse (5040212220431), we get a palindrome (6380434340836).

The spelling of 1340222120405 in words is "one trillion, three hundred forty billion, two hundred twenty-two million, one hundred twenty thousand, four hundred five".