20020101001 has 2 divisors, whose sum is σ = 20020101002. Its totient is φ = 20020101000.

The previous prime is 20020100999. The next prime is 20020101029. The reversal of 20020101001 is 10010102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19308492025 + 711608976 = 138955^2 + 26676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020101001 - 2¹ = 20020100999 is a prime.

Together with 20020100999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20020101061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010050500 + 10010050501.

It is an arithmetic number, because the mean of its divisors is an integer number (10010050501).

Almost surely, 2^20020101001 is an apocalyptic number.

It is an amenable number.

20020101001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020101001 is an equidigital number, since it uses as much as digits as its factorization.

20020101001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20020101001 its reverse (10010102002), we get a palindrome (30030203003).

The spelling of 20020101001 in words is "twenty billion, twenty million, one hundred one thousand, one".