200161230421 has 4 divisors (see below), whose sum is σ = 202410233100. Its totient is φ = 197912227744.

The previous prime is 200161230403. The next prime is 200161230427. The reversal of 200161230421 is 124032161002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124032161002 = 2 ⋅62016080501.

It can be written as a sum of positive squares in 2 ways, for example, as 47269282225 + 152891948196 = 217415^2 + 391014^2 .

It is not a de Polignac number, because 200161230421 - 2¹³ = 200161222229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200161230392 and 200161230401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200161230427) 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, 1124501206 + ... + 1124501383.

It is an arithmetic number, because the mean of its divisors is an integer number (50602558275).

Almost surely, 2^200161230421 is an apocalyptic number.

It is an amenable number.

200161230421 is a deficient number, since it is larger than the sum of its proper divisors (2249002679).

200161230421 is an equidigital number, since it uses as much as digits as its factorization.

200161230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249002678.

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

Adding to 200161230421 its reverse (124032161002), we get a palindrome (324193391423).

The spelling of 200161230421 in words is "two hundred billion, one hundred sixty-one million, two hundred thirty thousand, four hundred twenty-one".