210011120020 has 48 divisors (see below), whose sum is σ = 479650742928. Its totient is φ = 76774809600.

The previous prime is 210011119991. The next prime is 210011120057. The reversal of 210011120020 is 20021110012.

It can be written as a sum of positive squares in 8 ways, for example, as 11364412816 + 198646707204 = 106604^2 + 445698^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 210011119979 and 210011120006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972429 + ... + 4024948.

It is an arithmetic number, because the mean of its divisors is an integer number (9992723811).

Almost surely, 2^210011120020 is an apocalyptic number.

210011120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210011120020 is an abundant number, since it is smaller than the sum of its proper divisors (269639622908).

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

210011120020 is a wasteful number, since it uses less digits than its factorization.

210011120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7997500 (or 7997498 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210011120020 its reverse (20021110012), we get a palindrome (230032230032).

The spelling of 210011120020 in words is "two hundred ten billion, eleven million, one hundred twenty thousand, twenty".