212120222122110 has 256 divisors, whose sum is σ = 550706740835328. Its totient is φ = 52100441702400.

The previous prime is 212120222122099. The next prime is 212120222122141. The reversal of 212120222122110 is 11221222021212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1820981929 + ... + 1821098411.

It is an arithmetic number, because the mean of its divisors is an integer number (2151198206388).

Almost surely, 2^{212120222122110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212120222122110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275353370417664).

212120222122110 is an abundant number, since it is smaller than the sum of its proper divisors (338586518713218).

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

212120222122110 is a wasteful number, since it uses less digits than its factorization.

212120222122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117019.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212120222122110 its reverse (11221222021212), we get a palindrome (223341444143322).

The spelling of 212120222122110 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred ten".