2002001220077 has 2 divisors, whose sum is σ = 2002001220078. Its totient is φ = 2002001220076.

The previous prime is 2002001220053. The next prime is 2002001220227. The reversal of 2002001220077 is 7700221002002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017181170916 + 984820049161 = 1008554^2 + 992381^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002001220077 - 2²⁸ = 2001732784621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002001220677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001000610038 + 1001000610039.

It is an arithmetic number, because the mean of its divisors is an integer number (1001000610039).

Almost surely, 2^{2002001220077} is an apocalyptic number.

It is an amenable number.

2002001220077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002001220077 is an equidigital number, since it uses as much as digits as its factorization.

2002001220077 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 23.

Adding to 2002001220077 its reverse (7700221002002), we get a palindrome (9702222222079).

The spelling of 2002001220077 in words is "two trillion, two billion, one million, two hundred twenty thousand, seventy-seven".