21223321101222 has 16 divisors (see below), whose sum is σ = 43593848748912. Its totient is φ = 6883239276000.

The previous prime is 21223321101217. The next prime is 21223321101223. The reversal of 21223321101222 is 22210112332212.

It is a junction number, because it is equal to n+sod(n) for n = 21223321101192 and 21223321101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223321101223) 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, 47800272529 + ... + 47800272972.

It is an arithmetic number, because the mean of its divisors is an integer number (2724615546807).

Almost surely, 2^{21223321101222} is an apocalyptic number.

21223321101222 is an abundant number, since it is smaller than the sum of its proper divisors (22370527647690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21223321101222 is a wasteful number, since it uses less digits than its factorization.

21223321101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95600545543.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21223321101222 its reverse (22210112332212), we get a palindrome (43433433433434).

The spelling of 21223321101222 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred twenty-one million, one hundred one thousand, two hundred twenty-two".