21020211210101 has 8 divisors (see below), whose sum is σ = 21044242391808. Its totient is φ = 20996185716000.

The previous prime is 21020211210059. The next prime is 21020211210109. The reversal of 21020211210101 is 10101211202012.

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 21020211210101 - 2³⁴ = 21003031340917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020211210109) 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, 5996006 + ... + 8831336.

It is an arithmetic number, because the mean of its divisors is an integer number (2630530298976).

Almost surely, 2^{21020211210101} is an apocalyptic number.

It is an amenable number.

21020211210101 is a deficient number, since it is larger than the sum of its proper divisors (24031181707).

21020211210101 is an equidigital number, since it uses as much as digits as its factorization.

21020211210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843803.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21020211210101 its reverse (10101211202012), we get a palindrome (31121422412113).

The spelling of 21020211210101 in words is "twenty-one trillion, twenty billion, two hundred eleven million, two hundred ten thousand, one hundred one".