11202020161 has 2 divisors, whose sum is σ = 11202020162. Its totient is φ = 11202020160.

The previous prime is 11202020149. The next prime is 11202020197. The reversal of 11202020161 is 16102020211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8223043761 + 2978976400 = 90681^2 + 54580^2 .

It is an emirp because it is prime and its reverse (16102020211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11202020161 - 2⁵ = 11202020129 is a prime.

It is not a weakly prime, because it can be changed into another prime (11202020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601010080 + 5601010081.

It is an arithmetic number, because the mean of its divisors is an integer number (5601010081).

Almost surely, 2^11202020161 is an apocalyptic number.

It is an amenable number.

11202020161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11202020161 is an equidigital number, since it uses as much as digits as its factorization.

11202020161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11202020161 its reverse (16102020211), we get a palindrome (27304040372).

The spelling of 11202020161 in words is "eleven billion, two hundred two million, twenty thousand, one hundred sixty-one".