20002002101 has 2 divisors, whose sum is σ = 20002002102. Its totient is φ = 20002002100.

The previous prime is 20002002089. The next prime is 20002002131. The reversal of 20002002101 is 10120020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13305853201 + 6696148900 = 115351^2 + 81830^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002002101 - 2³⁰ = 18928260277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002002131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001001050 + 10001001051.

It is an arithmetic number, because the mean of its divisors is an integer number (10001001051).

Almost surely, 2^20002002101 is an apocalyptic number.

It is an amenable number.

20002002101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002002101 is an equidigital number, since it uses as much as digits as its factorization.

20002002101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20002002101 its reverse (10120020002), we get a palindrome (30122022103).

The spelling of 20002002101 in words is "twenty billion, two million, two thousand, one hundred one".