204220403420123 has 16 divisors (see below), whose sum is σ = 206236372860000. Its totient is φ = 202212613650432.

The previous prime is 204220403420113. The next prime is 204220403420171. The reversal of 204220403420123 is 321024304022402.

It is a cyclic number.

It is not a de Polignac number, because 204220403420123 - 2³⁴ = 204203223550939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204220403420113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97102403 + ... + 99183251.

It is an arithmetic number, because the mean of its divisors is an integer number (12889773303750).

Almost surely, 2^{204220403420123} is an apocalyptic number.

204220403420123 is a deficient number, since it is larger than the sum of its proper divisors (2015969439877).

204220403420123 is a wasteful number, since it uses less digits than its factorization.

204220403420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082814.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 204220403420123 its reverse (321024304022402), we get a palindrome (525244707442525).

The spelling of 204220403420123 in words is "two hundred four trillion, two hundred twenty billion, four hundred three million, four hundred twenty thousand, one hundred twenty-three".