210011101020 has 72 divisors (see below), whose sum is σ = 728038487904. Its totient is φ = 48002537088.

The previous prime is 210011100997. The next prime is 210011101031. The reversal of 210011101020 is 20101110012.

It is a happy number.

210011101020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210011100993 and 210011101011.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 83336479 + ... + 83338998.

Almost surely, 2^210011101020 is an apocalyptic number.

210011101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210011101020 is an abundant number, since it is smaller than the sum of its proper divisors (518027386884).

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

210011101020 is a wasteful number, since it uses less digits than its factorization.

210011101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166675499 (or 166675494 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210011101020 its reverse (20101110012), we get a palindrome (230112211032).

The spelling of 210011101020 in words is "two hundred ten billion, eleven million, one hundred one thousand, twenty".