21010202010101 has 8 divisors (see below), whose sum is σ = 21457755083520. Its totient is φ = 20562670915888.

The previous prime is 21010202010073. The next prime is 21010202010121. The reversal of 21010202010101 is 10101020201012.

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 21010202010101 - 2⁶ = 21010202010037 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 (21010202010121) 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, 3555401 + ... + 7393326.

It is an arithmetic number, because the mean of its divisors is an integer number (2682219385440).

Almost surely, 2^{21010202010101} is an apocalyptic number.

It is an amenable number.

21010202010101 is a deficient number, since it is larger than the sum of its proper divisors (447553073419).

21010202010101 is a wasteful number, since it uses less digits than its factorization.

21010202010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10989603.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010202010101 its reverse (10101020201012), we get a palindrome (31111222211113).

The spelling of 21010202010101 in words is "twenty-one trillion, ten billion, two hundred two million, ten thousand, one hundred one".