20040020101 has 2 divisors, whose sum is σ = 20040020102. Its totient is φ = 20040020100.

The previous prime is 20040020023. The next prime is 20040020107. The reversal of 20040020101 is 10102004002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14538089476 + 5501930625 = 120574^2 + 74175^2 .

It is a cyclic number.

It is not a de Polignac number, because 20040020101 - 2⁷ = 20040019973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20040020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020010050 + 10020010051.

It is an arithmetic number, because the mean of its divisors is an integer number (10020010051).

Almost surely, 2^20040020101 is an apocalyptic number.

It is an amenable number.

20040020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040020101 is an equidigital number, since it uses as much as digits as its factorization.

20040020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20040020101 its reverse (10102004002), we get a palindrome (30142024103).

The spelling of 20040020101 in words is "twenty billion, forty million, twenty thousand, one hundred one".