21010110212223 has 12 divisors (see below), whose sum is σ = 33106840334568. Its totient is φ = 12733400128560.

The previous prime is 21010110212219. The next prime is 21010110212269. The reversal of 21010110212223 is 32221201101012.

21010110212223 is a `hidden beast` number, since 210 + 10 + 1 + 10 + 212 + 223 = 666.

It is not a de Polignac number, because 21010110212223 - 2² = 21010110212219 is a prime.

It is a super-2 number, since 2×21010110212223² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21010110212196 and 21010110212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110212293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106111667640 + ... + 106111667837.

It is an arithmetic number, because the mean of its divisors is an integer number (2758903361214).

Almost surely, 2^{21010110212223} is an apocalyptic number.

21010110212223 is a deficient number, since it is larger than the sum of its proper divisors (12096730122345).

21010110212223 is a wasteful number, since it uses less digits than its factorization.

21010110212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212223335494 (or 212223335491 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21010110212223 its reverse (32221201101012), we get a palindrome (53231311313235).

The spelling of 21010110212223 in words is "twenty-one trillion, ten billion, one hundred ten million, two hundred twelve thousand, two hundred twenty-three".