12213323220021 has 16 divisors (see below), whose sum is σ = 20302667171328. Its totient is φ = 6344583490800.

The previous prime is 12213323220017. The next prime is 12213323220031. The reversal of 12213323220021 is 12002232331221.

It is not a de Polignac number, because 12213323220021 - 2² = 12213323220017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12213323219973 and 12213323220000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213323220031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26435764315 + ... + 26435764776.

It is an arithmetic number, because the mean of its divisors is an integer number (1268916698208).

Almost surely, 2^{12213323220021} is an apocalyptic number.

12213323220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12213323220021 is a deficient number, since it is larger than the sum of its proper divisors (8089343951307).

12213323220021 is a wasteful number, since it uses less digits than its factorization.

12213323220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52871529112.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 12213323220021 its reverse (12002232331221), we get a palindrome (24215555551242).

The spelling of 12213323220021 in words is "twelve trillion, two hundred thirteen billion, three hundred twenty-three million, two hundred twenty thousand, twenty-one".