21010201010101 has 8 divisors (see below), whose sum is σ = 21349508455520. Its totient is φ = 20671650104688.

The previous prime is 21010201010047. The next prime is 21010201010147. The reversal of 21010201010101 is 10101010201012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21010201010101 - 2¹¹ = 21010201008053 is a prime.

It is a Duffinian number.

21010201010101 is a modest number, since divided by 1010101 gives 210102 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010201010171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189079011 + ... + 189190096.

It is an arithmetic number, because the mean of its divisors is an integer number (2668688556940).

Almost surely, 2^{21010201010101} is an apocalyptic number.

It is an amenable number.

21010201010101 is a deficient number, since it is larger than the sum of its proper divisors (339307445419).

21010201010101 is an equidigital number, since it uses as much as digits as its factorization.

21010201010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378270003.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21010201010101 its reverse (10101010201012), we get a palindrome (31111211211113).

The spelling of 21010201010101 in words is "twenty-one trillion, ten billion, two hundred one million, ten thousand, one hundred one".