212220121021110 has 96 divisors (see below), whose sum is σ = 565316181061632. Its totient is φ = 55203337820160.

The previous prime is 212220121021087. The next prime is 212220121021147. The reversal of 212220121021110 is 11120121022212.

212220121021110 is a `hidden beast` number, since 2 + 12 + 220 + 1 + 210 + 211 + 10 = 666.

212220121021110 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 47 ways as a sum of consecutive naturals, for example, 19896907 + ... + 28641353.

It is an arithmetic number, because the mean of its divisors is an integer number (5888710219392).

Almost surely, 2^{212220121021110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212220121021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282658090530816).

212220121021110 is an abundant number, since it is smaller than the sum of its proper divisors (353096060040522).

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

212220121021110 is a wasteful number, since it uses less digits than its factorization.

212220121021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8751078 (or 8751075 counting only the distinct ones).

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

Adding to 212220121021110 its reverse (11120121022212), we get a palindrome (223340242043322).

The spelling of 212220121021110 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, one hundred ten".