21110201011023 has 4 divisors (see below), whose sum is σ = 28146934681368. Its totient is φ = 14073467340680.

The previous prime is 21110201010989. The next prime is 21110201011051. The reversal of 21110201011023 is 32011010201112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21110201011023 - 2²¹ = 21110198913871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110201010993 and 21110201011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110201011093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518366835168 + ... + 3518366835173.

It is an arithmetic number, because the mean of its divisors is an integer number (7036733670342).

Almost surely, 2^{21110201011023} is an apocalyptic number.

21110201011023 is a deficient number, since it is larger than the sum of its proper divisors (7036733670345).

21110201011023 is an equidigital number, since it uses as much as digits as its factorization.

21110201011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036733670344.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21110201011023 its reverse (32011010201112), we get a palindrome (53121211212135).

The spelling of 21110201011023 in words is "twenty-one trillion, one hundred ten billion, two hundred one million, eleven thousand, twenty-three".