20002120011077 has 2 divisors, whose sum is σ = 20002120011078. Its totient is φ = 20002120011076.

The previous prime is 20002120011067. The next prime is 20002120011131. The reversal of 20002120011077 is 77011002120002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12459989276641 + 7542130734436 = 3529871^2 + 2746294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002120011077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002120011007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001060005538 + 10001060005539.

It is an arithmetic number, because the mean of its divisors is an integer number (10001060005539).

Almost surely, 2^{20002120011077} is an apocalyptic number.

It is an amenable number.

20002120011077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002120011077 is an equidigital number, since it uses as much as digits as its factorization.

20002120011077 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 23.

Adding to 20002120011077 its reverse (77011002120002), we get a palindrome (97013122131079).

The spelling of 20002120011077 in words is "twenty trillion, two billion, one hundred twenty million, eleven thousand, seventy-seven".