21010110201021 has 8 divisors (see below), whose sum is σ = 28275288495264. Its totient is φ = 13875836020400.

The previous prime is 21010110201007. The next prime is 21010110201029. The reversal of 21010110201021 is 12010201101012.

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 21010110201021 - 2⁶ = 21010110200957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010110200988 and 21010110201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110201029) 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, 32726028030 + ... + 32726028671.

It is an arithmetic number, because the mean of its divisors is an integer number (3534411061908).

Almost surely, 2^{21010110201021} is an apocalyptic number.

It is an amenable number.

21010110201021 is a deficient number, since it is larger than the sum of its proper divisors (7265178294243).

21010110201021 is a wasteful number, since it uses less digits than its factorization.

21010110201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65452056811.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21010110201021 its reverse (12010201101012), we get a palindrome (33020311302033).

The spelling of 21010110201021 in words is "twenty-one trillion, ten billion, one hundred ten million, two hundred one thousand, twenty-one".