212221110121110 has 192 divisors, whose sum is σ = 565170471290880. Its totient is φ = 55236552134400.

The previous prime is 212221110121093. The next prime is 212221110121123. The reversal of 212221110121110 is 11121011122212.

It is a happy number.

212221110121110 is a `hidden beast` number, since 212 + 2 + 211 + 10 + 121 + 110 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 461514927 + ... + 461974533.

It is an arithmetic number, because the mean of its divisors is an integer number (2943596204640).

Almost surely, 2^{212221110121110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221110121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282585235645440).

212221110121110 is an abundant number, since it is smaller than the sum of its proper divisors (352949361169770).

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

212221110121110 is a wasteful number, since it uses less digits than its factorization.

212221110121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460443 (or 460440 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212221110121110 its reverse (11121011122212), we get a palindrome (223342121243322).

The spelling of 212221110121110 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred ten".