20020021012177 has 2 divisors, whose sum is σ = 20020021012178. Its totient is φ = 20020021012176.

The previous prime is 20020021012111. The next prime is 20020021012207. The reversal of 20020021012177 is 77121012002002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13354376244496 + 6665644767681 = 3654364^2 + 2581791^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020021012177 - 2²⁷ = 20019886794449 is a prime.

It is not a weakly prime, because it can be changed into another prime (20020021015177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010010506088 + 10010010506089.

It is an arithmetic number, because the mean of its divisors is an integer number (10010010506089).

Almost surely, 2^{20020021012177} is an apocalyptic number.

It is an amenable number.

20020021012177 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020021012177 is an equidigital number, since it uses as much as digits as its factorization.

20020021012177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 20020021012177 its reverse (77121012002002), we get a palindrome (97141033014179).

The spelling of 20020021012177 in words is "twenty trillion, twenty billion, twenty-one million, twelve thousand, one hundred seventy-seven".