1620210304201 has 4 divisors (see below), whose sum is σ = 1620231309972. Its totient is φ = 1620189298432.

The previous prime is 1620210304189. The next prime is 1620210304217. The reversal of 1620210304201 is 1024030120261.

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 373021670025 + 1247188634176 = 610755^2 + 1116776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620210304201 - 2⁷ = 1620210304073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620210304001) 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, 10386760 + ... + 10541593.

It is an arithmetic number, because the mean of its divisors is an integer number (405057827493).

Almost surely, 2^{1620210304201} is an apocalyptic number.

It is an amenable number.

1620210304201 is a deficient number, since it is larger than the sum of its proper divisors (21005771).

1620210304201 is an equidigital number, since it uses as much as digits as its factorization.

1620210304201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21005770.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1620210304201 its reverse (1024030120261), we get a palindrome (2644240424462).

The spelling of 1620210304201 in words is "one trillion, six hundred twenty billion, two hundred ten million, three hundred four thousand, two hundred one".