204120012001 has 4 divisors (see below), whose sum is σ = 204122706372. Its totient is φ = 204117317632.

The previous prime is 204120011971. The next prime is 204120012029. The reversal of 204120012001 is 100210021402.

It is a happy number.

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 35711550625 + 168408461376 = 188975^2 + 410376^2 .

It is a cyclic number.

It is not a de Polignac number, because 204120012001 - 2⁹ = 204120011489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204120012601) 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, 1230160 + ... + 1386193.

It is an arithmetic number, because the mean of its divisors is an integer number (51030676593).

Almost surely, 2^204120012001 is an apocalyptic number.

It is an amenable number.

204120012001 is a deficient number, since it is larger than the sum of its proper divisors (2694371).

204120012001 is an equidigital number, since it uses as much as digits as its factorization.

204120012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694370.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 204120012001 its reverse (100210021402), we get a palindrome (304330033403).

The spelling of 204120012001 in words is "two hundred four billion, one hundred twenty million, twelve thousand, one".