204020011240221 has 32 divisors (see below), whose sum is σ = 297931660296192. Its totient is φ = 123159660599360.

The previous prime is 204020011240219. The next prime is 204020011240231. The reversal of 204020011240221 is 122042110020402.

It is not a de Polignac number, because 204020011240221 - 2¹ = 204020011240219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204020011240211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1472010 + ... + 20253563.

It is an arithmetic number, because the mean of its divisors is an integer number (9310364384256).

Almost surely, 2^{204020011240221} is an apocalyptic number.

It is an amenable number.

204020011240221 is a deficient number, since it is larger than the sum of its proper divisors (93911649055971).

204020011240221 is a wasteful number, since it uses less digits than its factorization.

204020011240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21726713.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 204020011240221 its reverse (122042110020402), we get a palindrome (326062121260623).

The spelling of 204020011240221 in words is "two hundred four trillion, twenty billion, eleven million, two hundred forty thousand, two hundred twenty-one".