210021210021222 has 12 divisors (see below), whose sum is σ = 455045955046020. Its totient is φ = 70007070007068.

The previous prime is 210021210021191. The next prime is 210021210021229. The reversal of 210021210021222 is 222120012120012.

It is a happy number.

210021210021222 is a `hidden beast` number, since 210 + 0 + 2 + 1 + 210 + 0 + 21 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11667845001179 = 210021210021222 / (2 + 1 + 0 + 0 + 2 + 1 + 2 + 1 + 0 + 0 + 2 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 210021210021195 and 210021210021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021210021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5833922500572 + ... + 5833922500607.

It is an arithmetic number, because the mean of its divisors is an integer number (37920496253835).

Almost surely, 2^{210021210021222} is an apocalyptic number.

210021210021222 is an abundant number, since it is smaller than the sum of its proper divisors (245024745024798).

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

210021210021222 is a wasteful number, since it uses less digits than its factorization.

210021210021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11667845001187 (or 11667845001184 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210021210021222 its reverse (222120012120012), we get a palindrome (432141222141234).

The spelling of 210021210021222 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, twenty-one thousand, two hundred twenty-two".