20200122161 has 2 divisors, whose sum is σ = 20200122162. Its totient is φ = 20200122160.

The previous prime is 20200122119. The next prime is 20200122197. The reversal of 20200122161 is 16122100202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11431672561 + 8768449600 = 106919^2 + 93640^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200122161 - 2¹⁸ = 20199860017 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200142161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100061080 + 10100061081.

It is an arithmetic number, because the mean of its divisors is an integer number (10100061081).

Almost surely, 2^20200122161 is an apocalyptic number.

It is an amenable number.

20200122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200122161 is an equidigital number, since it uses as much as digits as its factorization.

20200122161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20200122161 its reverse (16122100202), we get a palindrome (36322222363).

The spelling of 20200122161 in words is "twenty billion, two hundred million, one hundred twenty-two thousand, one hundred sixty-one".