1345436221105 has 4 divisors (see below), whose sum is σ = 1614523465332. Its totient is φ = 1076348976880.

The previous prime is 1345436221037. The next prime is 1345436221123. The reversal of 1345436221105 is 5011226345431.

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 851738872609 + 493697348496 = 922897^2 + 702636^2 .

It is not a de Polignac number, because 1345436221105 - 2³³ = 1336846286513 is a prime.

It is a super-2 number, since 2×1345436221105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134543622106 + ... + 134543622115.

It is an arithmetic number, because the mean of its divisors is an integer number (403630866333).

Almost surely, 2^{1345436221105} is an apocalyptic number.

It is an amenable number.

1345436221105 is a deficient number, since it is larger than the sum of its proper divisors (269087244227).

1345436221105 is an equidigital number, since it uses as much as digits as its factorization.

1345436221105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269087244226.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 1345436221105 in words is "one trillion, three hundred forty-five billion, four hundred thirty-six million, two hundred twenty-one thousand, one hundred five".