21223211232213 has 24 divisors (see below), whose sum is σ = 30859264590336. Its totient is φ = 14054880492000.

The previous prime is 21223211232199. The next prime is 21223211232229. The reversal of 21223211232213 is 31223211232212.

21223211232213 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 3 + 211 + 232 + 213 = 666.

It is not a de Polignac number, because 21223211232213 - 2²⁵ = 21223177677781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223211132213) 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, 152180431 + ... + 152319827.

It is an arithmetic number, because the mean of its divisors is an integer number (1285802691264).

Almost surely, 2^{21223211232213} is an apocalyptic number.

It is an amenable number.

21223211232213 is a deficient number, since it is larger than the sum of its proper divisors (9636053358123).

21223211232213 is a wasteful number, since it uses less digits than its factorization.

21223211232213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251585 (or 251582 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21223211232213 its reverse (31223211232212), we get a palindrome (52446422464425).

Subtracting 21223211232213 from its reverse (31223211232212), we obtain a palindrome (9999999999999).

It can be divided in two parts, 21223211 and 232213, that added together give a square (21455424 = 4632²).

The spelling of 21223211232213 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred eleven million, two hundred thirty-two thousand, two hundred thirteen".