20201000121077 has 2 divisors, whose sum is σ = 20201000121078. Its totient is φ = 20201000121076.

The previous prime is 20201000121037. The next prime is 20201000121149. The reversal of 20201000121077 is 77012100010202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16903601737201 + 3297398383876 = 4111399^2 + 1815874^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201000121077 - 2⁶ = 20201000121013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201000121017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100500060538 + 10100500060539.

It is an arithmetic number, because the mean of its divisors is an integer number (10100500060539).

Almost surely, 2^{20201000121077} is an apocalyptic number.

It is an amenable number.

20201000121077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201000121077 is an equidigital number, since it uses as much as digits as its factorization.

20201000121077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

Adding to 20201000121077 its reverse (77012100010202), we get a palindrome (97213100131279).

The spelling of 20201000121077 in words is "twenty trillion, two hundred one billion, one hundred twenty-one thousand, seventy-seven".