210203571161 has 4 divisors (see below), whose sum is σ = 210314148324. Its totient is φ = 210092994000.

The previous prime is 210203571121. The next prime is 210203571239. The reversal of 210203571161 is 161175302012.

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 8382501136 + 201821070025 = 91556^2 + 449245^2 .

It is a cyclic number.

It is not a de Polignac number, because 210203571161 - 2¹⁴ = 210203554777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210203571101) 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, 55285730 + ... + 55289531.

It is an arithmetic number, because the mean of its divisors is an integer number (52578537081).

Almost surely, 2^210203571161 is an apocalyptic number.

It is an amenable number.

210203571161 is a deficient number, since it is larger than the sum of its proper divisors (110577163).

210203571161 is a wasteful number, since it uses less digits than its factorization.

210203571161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110577162.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 210203571161 its reverse (161175302012), we get a palindrome (371378873173).

The spelling of 210203571161 in words is "two hundred ten billion, two hundred three million, five hundred seventy-one thousand, one hundred sixty-one".