21010110331223 has 32 divisors (see below), whose sum is σ = 22913037000000. Its totient is φ = 19148792205312.

The previous prime is 21010110331183. The next prime is 21010110331261. The reversal of 21010110331223 is 32213301101012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21010110331223 - 2²⁶ = 21010043222359 is a prime.

It is a super-2 number, since 2×21010110331223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010110331195 and 21010110331204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110331123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2790554123 + ... + 2790561651.

It is an arithmetic number, because the mean of its divisors is an integer number (716032406250).

Almost surely, 2^{21010110331223} is an apocalyptic number.

21010110331223 is a deficient number, since it is larger than the sum of its proper divisors (1902926668777).

21010110331223 is a wasteful number, since it uses less digits than its factorization.

21010110331223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10739.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21010110331223 its reverse (32213301101012), we get a palindrome (53223411432235).

The spelling of 21010110331223 in words is "twenty-one trillion, ten billion, one hundred ten million, three hundred thirty-one thousand, two hundred twenty-three".