1021341322405 has 4 divisors (see below), whose sum is σ = 1225609586892. Its totient is φ = 817073057920.

The previous prime is 1021341322403. The next prime is 1021341322409. The reversal of 1021341322405 is 5042231431201.

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 370870038081 + 650471284324 = 608991^2 + 806518^2 .

It is not a de Polignac number, because 1021341322405 - 2¹ = 1021341322403 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 (1021341322403) 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, 102134132236 + ... + 102134132245.

It is an arithmetic number, because the mean of its divisors is an integer number (306402396723).

Almost surely, 2^{1021341322405} is an apocalyptic number.

It is an amenable number.

1021341322405 is a deficient number, since it is larger than the sum of its proper divisors (204268264487).

1021341322405 is an equidigital number, since it uses as much as digits as its factorization.

1021341322405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204268264486.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1021341322405 its reverse (5042231431201), we get a palindrome (6063572753606).

The spelling of 1021341322405 in words is "one trillion, twenty-one billion, three hundred forty-one million, three hundred twenty-two thousand, four hundred five".