20210010101 has 4 divisors (see below), whose sum is σ = 20541321804. Its totient is φ = 19878698400.

The previous prime is 20210010097. The next prime is 20210010109. The reversal of 20210010101 is 10101001202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1829700625 + 18380309476 = 42775^2 + 135574^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210010101 - 2² = 20210010097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210010109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165655760 + ... + 165655881.

It is an arithmetic number, because the mean of its divisors is an integer number (5135330451).

Almost surely, 2^20210010101 is an apocalyptic number.

It is an amenable number.

20210010101 is a deficient number, since it is larger than the sum of its proper divisors (331311703).

20210010101 is an equidigital number, since it uses as much as digits as its factorization.

20210010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331311702.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20210010101 its reverse (10101001202), we get a palindrome (30311011303).

The spelling of 20210010101 in words is "twenty billion, two hundred ten million, ten thousand, one hundred one".