161010201211 has 4 divisors (see below), whose sum is σ = 162573407152. Its totient is φ = 159446995272.

The previous prime is 161010201193. The next prime is 161010201271. The reversal of 161010201211 is 112102010161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161010201211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161010201271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781602816 + ... + 781603021.

It is an arithmetic number, because the mean of its divisors is an integer number (40643351788).

Almost surely, 2^161010201211 is an apocalyptic number.

161010201211 is a deficient number, since it is larger than the sum of its proper divisors (1563205941).

161010201211 is a wasteful number, since it uses less digits than its factorization.

161010201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563205940.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 161010201211 its reverse (112102010161), we get a palindrome (273112211372).

The spelling of 161010201211 in words is "one hundred sixty-one billion, ten million, two hundred one thousand, two hundred eleven".