210011110001220 has 192 divisors, whose sum is σ = 671015929006080. Its totient is φ = 48579160396800.

The previous prime is 210011110001137. The next prime is 210011110001249. The reversal of 210011110001220 is 22100011110012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210011110001196 and 210011110001205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10704246 + ... + 23121485.

It is an arithmetic number, because the mean of its divisors is an integer number (3494874630240).

Almost surely, 2^{210011110001220} is an apocalyptic number.

210011110001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210011110001220 is an abundant number, since it is smaller than the sum of its proper divisors (461004819004860).

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

210011110001220 is a wasteful number, since it uses less digits than its factorization.

210011110001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33826186 (or 33826184 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210011110001220 its reverse (22100011110012), we get a palindrome (232111121111232).

The spelling of 210011110001220 in words is "two hundred ten trillion, eleven billion, one hundred ten million, one thousand, two hundred twenty".