3421021401205 has 4 divisors (see below), whose sum is σ = 4105225681452. Its totient is φ = 2736817120960.

The previous prime is 3421021401199. The next prime is 3421021401209. The reversal of 3421021401205 is 5021041201243.

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 1823509939876 + 1597511461329 = 1350374^2 + 1263927^2 .

It is not a de Polignac number, because 3421021401205 - 2⁵ = 3421021401173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3421021401205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421021401209) 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, 342102140116 + ... + 342102140125.

It is an arithmetic number, because the mean of its divisors is an integer number (1026306420363).

Almost surely, 2^{3421021401205} is an apocalyptic number.

It is an amenable number.

3421021401205 is a deficient number, since it is larger than the sum of its proper divisors (684204280247).

3421021401205 is an equidigital number, since it uses as much as digits as its factorization.

3421021401205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684204280246.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 3421021401205 its reverse (5021041201243), we get a palindrome (8442062602448).

The spelling of 3421021401205 in words is "three trillion, four hundred twenty-one billion, twenty-one million, four hundred one thousand, two hundred five".