12021300022221 has 24 divisors (see below), whose sum is σ = 19888109618624. Its totient is φ = 6854282959680.

The previous prime is 12021300022189. The next prime is 12021300022223. The reversal of 12021300022221 is 12222000312021.

12021300022221 is a `hidden beast` number, since 120 + 2 + 1 + 300 + 0 + 22 + 221 = 666.

It is not a de Polignac number, because 12021300022221 - 2⁵ = 12021300022189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12021300022194 and 12021300022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021300022223) 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, 208739575 + ... + 208797156.

Almost surely, 2^{12021300022221} is an apocalyptic number.

It is an amenable number.

12021300022221 is a deficient number, since it is larger than the sum of its proper divisors (7866809596403).

12021300022221 is a wasteful number, since it uses less digits than its factorization.

12021300022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417537201 (or 417537198 counting only the distinct ones).

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

Adding to 12021300022221 its reverse (12222000312021), we get a palindrome (24243300334242).

The spelling of 12021300022221 in words is "twelve trillion, twenty-one billion, three hundred million, twenty-two thousand, two hundred twenty-one".