21112202223 has 24 divisors (see below), whose sum is σ = 35053363488. Its totient is φ = 11994374592.

The previous prime is 21112202213. The next prime is 21112202227. The reversal of 21112202223 is 32220221112.

It is not a de Polignac number, because 21112202223 - 2⁹ = 21112201711 is a prime.

It is a super-2 number, since 2×21112202223² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112202196 and 21112202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112202227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 957640 + ... + 979437.

It is an arithmetic number, because the mean of its divisors is an integer number (1460556812).

Almost surely, 2^21112202223 is an apocalyptic number.

21112202223 is a deficient number, since it is larger than the sum of its proper divisors (13941161265).

21112202223 is a wasteful number, since it uses less digits than its factorization.

21112202223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937263 (or 1937260 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21112202223 its reverse (32220221112), we get a palindrome (53332423335).

The spelling of 21112202223 in words is "twenty-one billion, one hundred twelve million, two hundred two thousand, two hundred twenty-three".