212011221121110 has 64 divisors (see below), whose sum is σ = 577392261811200. Its totient is φ = 55333425083616.

The previous prime is 212011221121069. The next prime is 212011221121121. The reversal of 212011221121110 is 11121122110212.

It is a happy number.

212011221121110 is a `hidden beast` number, since 2 + 120 + 112 + 211 + 211 + 10 = 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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8353463320 + ... + 8353488699.

It is an arithmetic number, because the mean of its divisors is an integer number (9021754090800).

Almost surely, 2^{212011221121110} is an apocalyptic number.

212011221121110 is an abundant number, since it is smaller than the sum of its proper divisors (365381040690090).

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

212011221121110 is a wasteful number, since it uses less digits than its factorization.

212011221121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16706952082 (or 16706952076 counting only the distinct ones).

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

Adding to 212011221121110 its reverse (11121122110212), we get a palindrome (223132343231322).

The spelling of 212011221121110 in words is "two hundred twelve trillion, eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred ten".