1002001200077 has 2 divisors, whose sum is σ = 1002001200078. Its totient is φ = 1002001200076.

The previous prime is 1002001200049. The next prime is 1002001200119. The reversal of 1002001200077 is 7700021002001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 906511547881 + 95489652196 = 952109^2 + 309014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002001200077 - 2⁸ = 1002001199821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002001200017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501000600038 + 501000600039.

It is an arithmetic number, because the mean of its divisors is an integer number (501000600039).

Almost surely, 2^{1002001200077} is an apocalyptic number.

It is an amenable number.

1002001200077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002001200077 is an equidigital number, since it uses as much as digits as its factorization.

1002001200077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 20.

Adding to 1002001200077 its reverse (7700021002001), we get a palindrome (8702022202078).

The spelling of 1002001200077 in words is "one trillion, two billion, one million, two hundred thousand, seventy-seven".