18200210221221 has 8 divisors (see below), whose sum is σ = 27733653670464. Its totient is φ = 10400120126400.

The previous prime is 18200210221169. The next prime is 18200210221229. The reversal of 18200210221221 is 12212201200281.

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

It is not a de Polignac number, because 18200210221221 - 2¹¹ = 18200210219173 is a prime.

It is a super-3 number, since 3×18200210221221³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18200210221191 and 18200210221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18200210221229) 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, 433338338580 + ... + 433338338621.

It is an arithmetic number, because the mean of its divisors is an integer number (3466706708808).

Almost surely, 2^{18200210221221} is an apocalyptic number.

It is an amenable number.

18200210221221 is a deficient number, since it is larger than the sum of its proper divisors (9533443449243).

18200210221221 is an equidigital number, since it uses as much as digits as its factorization.

18200210221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866676677211.

The product of its (nonzero) digits is 512, while the sum is 24.

The spelling of 18200210221221 in words is "eighteen trillion, two hundred billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".