21223222213123 has 8 divisors (see below), whose sum is σ = 24255702282240. Its totient is φ = 18190889939400.

The previous prime is 21223222213103. The next prime is 21223222213159. The reversal of 21223222213123 is 32131222232212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21223222213123 - 2⁵ = 21223222213091 is a prime.

It is a super-2 number, since 2×21223222213123² (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 = 21223222213091 and 21223222213100.

It is not an unprimeable number, because it can be changed into a prime (21223222213103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36640963 + ... + 37215676.

It is an arithmetic number, because the mean of its divisors is an integer number (3031962785280).

Almost surely, 2^{21223222213123} is an apocalyptic number.

21223222213123 is a deficient number, since it is larger than the sum of its proper divisors (3032480069117).

21223222213123 is an equidigital number, since it uses as much as digits as its factorization.

21223222213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73897697.

The product of its digits is 6912, while the sum is 28.

Adding to 21223222213123 its reverse (32131222232212), we get a palindrome (53354444445335).

The spelling of 21223222213123 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty-two million, two hundred thirteen thousand, one hundred twenty-three".