2001022061 has 2 divisors, whose sum is σ = 2001022062. Its totient is φ = 2001022060.

The previous prime is 2001021989. The next prime is 2001022073. The reversal of 2001022061 is 1602201002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1344688900 + 656333161 = 36670^2 + 25619^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001022061 - 2²² = 1996827757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001022081) 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, 1000511030 + 1000511031.

It is an arithmetic number, because the mean of its divisors is an integer number (1000511031).

Almost surely, 2^2001022061 is an apocalyptic number.

It is an amenable number.

2001022061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001022061 is an equidigital number, since it uses as much as digits as its factorization.

2001022061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2001022061 is about 44732.7850798494. The cubic root of 2001022061 is about 1260.1356327076.

Adding to 2001022061 its reverse (1602201002), we get a palindrome (3603223063).

The spelling of 2001022061 in words is "two billion, one million, twenty-two thousand, sixty-one".