210111222012120 has 1024 divisors, whose sum is σ = 831011776358400. Its totient is φ = 46550331555840.

The previous prime is 210111222012119. The next prime is 210111222012149. The reversal of 210111222012120 is 21210222111012.

210111222012120 is a `hidden beast` number, since 210 + 1 + 112 + 220 + 1 + 2 + 120 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 210111222012093 and 210111222012102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 17050324279 + ... + 17050336601.

It is an arithmetic number, because the mean of its divisors is an integer number (811534937850).

Almost surely, 2^{210111222012120} is an apocalyptic number.

210111222012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210111222012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415505888179200).

210111222012120 is an abundant number, since it is smaller than the sum of its proper divisors (620900554346280).

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

210111222012120 is a wasteful number, since it uses less digits than its factorization.

210111222012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13457 (or 13447 counting only the distinct ones).

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

Adding to 210111222012120 its reverse (21210222111012), we get a palindrome (231321444123132).

The spelling of 210111222012120 in words is "two hundred ten trillion, one hundred eleven billion, two hundred twenty-two million, twelve thousand, one hundred twenty".