204134211421 has 8 divisors (see below), whose sum is σ = 233301129984. Its totient is φ = 174968514960.

The previous prime is 204134211419. The next prime is 204134211433. The reversal of 204134211421 is 124112431402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204134211421 - 2¹ = 204134211419 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 (204134511421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85836 + ... + 644698.

It is an arithmetic number, because the mean of its divisors is an integer number (29162641248).

Almost surely, 2^204134211421 is an apocalyptic number.

It is an amenable number.

204134211421 is a deficient number, since it is larger than the sum of its proper divisors (29166918563).

204134211421 is an equidigital number, since it uses as much as digits as its factorization.

204134211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611051.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 204134211421 its reverse (124112431402), we get a palindrome (328246642823).

The spelling of 204134211421 in words is "two hundred four billion, one hundred thirty-four million, two hundred eleven thousand, four hundred twenty-one".