21110110211021 has 8 divisors (see below), whose sum is σ = 23930489308320. Its totient is φ = 18460663180272.

The previous prime is 21110110210961. The next prime is 21110110211033. The reversal of 21110110211021 is 12011201101112.

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 21110110211021 - 2¹⁴ = 21110110194637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21110110210987 and 21110110211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110110211051) 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, 42733016375 + ... + 42733016868.

It is an arithmetic number, because the mean of its divisors is an integer number (2991311163540).

Almost surely, 2^{21110110211021} is an apocalyptic number.

It is an amenable number.

21110110211021 is a deficient number, since it is larger than the sum of its proper divisors (2820379097299).

21110110211021 is a wasteful number, since it uses less digits than its factorization.

21110110211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85466033275.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21110110211021 its reverse (12011201101112), we get a palindrome (33121311312133).

The spelling of 21110110211021 in words is "twenty-one trillion, one hundred ten billion, one hundred ten million, two hundred eleven thousand, twenty-one".