210120212211111 has 64 divisors (see below), whose sum is σ = 317497930675200. Its totient is φ = 137315379801600.

The previous prime is 210120212211103. The next prime is 210120212211127. The reversal of 210120212211111 is 111112212021012.

It is a happy number.

210120212211111 is a `hidden beast` number, since 2 + 10 + 120 + 212 + 211 + 111 = 666.

It is not a de Polignac number, because 210120212211111 - 2³ = 210120212211103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120212211191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 324227875 + ... + 324875291.

It is an arithmetic number, because the mean of its divisors is an integer number (4960905166800).

Almost surely, 2^{210120212211111} is an apocalyptic number.

210120212211111 is a deficient number, since it is larger than the sum of its proper divisors (107377718464089).

210120212211111 is a wasteful number, since it uses less digits than its factorization.

210120212211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648677 (or 648671 counting only the distinct ones).

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

Adding to 210120212211111 its reverse (111112212021012), we get a palindrome (321232424232123).

The spelling of 210120212211111 in words is "two hundred ten trillion, one hundred twenty billion, two hundred twelve million, two hundred eleven thousand, one hundred eleven".