210021210111222 has 12 divisors (see below), whose sum is σ = 455045955241020. Its totient is φ = 70007070037068.

The previous prime is 210021210111161. The next prime is 210021210111347. The reversal of 210021210111222 is 222111012120012.

210021210111222 is a `hidden beast` number, since 2 + 100 + 21 + 210 + 111 + 222 = 666.

It is a super-2 number, since 2×210021210111222² (a number of 29 digits) contains 22 as substring.

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: 11667845006179 = 210021210111222 / (2 + 1 + 0 + 0 + 2 + 1 + 2 + 1 + 0 + 1 + 1 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 210021210111195 and 210021210111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5833922503072 + ... + 5833922503107.

It is an arithmetic number, because the mean of its divisors is an integer number (37920496270085).

Almost surely, 2^{210021210111222} is an apocalyptic number.

210021210111222 is an abundant number, since it is smaller than the sum of its proper divisors (245024745129798).

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

210021210111222 is a wasteful number, since it uses less digits than its factorization.

210021210111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11667845006187 (or 11667845006184 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210021210111222 its reverse (222111012120012), we get a palindrome (432132222231234).

The spelling of 210021210111222 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, one hundred eleven thousand, two hundred twenty-two".