2002020021061 has 2 divisors, whose sum is σ = 2002020021062. Its totient is φ = 2002020021060.

The previous prime is 2002020021041. The next prime is 2002020021151. The reversal of 2002020021061 is 1601200202002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1394253216225 + 607766804836 = 1180785^2 + 779594^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002020021061 - 2⁷ = 2002020020933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002020021041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001010010530 + 1001010010531.

It is an arithmetic number, because the mean of its divisors is an integer number (1001010010531).

Almost surely, 2^{2002020021061} is an apocalyptic number.

It is an amenable number.

2002020021061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002020021061 is an equidigital number, since it uses as much as digits as its factorization.

2002020021061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2002020021061 its reverse (1601200202002), we get a palindrome (3603220223063).

The spelling of 2002020021061 in words is "two trillion, two billion, twenty million, twenty-one thousand, sixty-one".