201020020177 has 2 divisors, whose sum is σ = 201020020178. Its totient is φ = 201020020176.

The previous prime is 201020020163. The next prime is 201020020181. The reversal of 201020020177 is 771020020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200425440721 + 594579456 = 447689^2 + 24384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201020020177 is a prime.

It is a super-2 number, since 2×201020020177² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201020020147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510010088 + 100510010089.

It is an arithmetic number, because the mean of its divisors is an integer number (100510010089).

Almost surely, 2^201020020177 is an apocalyptic number.

It is an amenable number.

201020020177 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020020177 is an equidigital number, since it uses as much as digits as its factorization.

201020020177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 22.

Adding to 201020020177 its reverse (771020020102), we get a palindrome (972040040279).

The spelling of 201020020177 in words is "two hundred one billion, twenty million, twenty thousand, one hundred seventy-seven".