21110121101223 has 192 divisors, whose sum is σ = 40104601804800. Its totient is φ = 10380575520000.

The previous prime is 21110121101207. The next prime is 21110121101233. The reversal of 21110121101223 is 32210112101112.

It is a happy number.

21110121101223 is a `hidden beast` number, since 211 + 10 + 121 + 101 + 223 = 666.

It is not a de Polignac number, because 21110121101223 - 2⁴ = 21110121101207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110121101196 and 21110121101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110121101233) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 255371448 + ... + 255454098.

It is an arithmetic number, because the mean of its divisors is an integer number (208878134400).

Almost surely, 2^{21110121101223} is an apocalyptic number.

21110121101223 is a deficient number, since it is larger than the sum of its proper divisors (18994480703577).

21110121101223 is a wasteful number, since it uses less digits than its factorization.

21110121101223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82954 (or 82951 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21110121101223 its reverse (32210112101112), we get a palindrome (53320233202335).

The spelling of 21110121101223 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty-three".