211350021020 has 24 divisors (see below), whose sum is σ = 443854597200. Its totient is φ = 84536284032.

The previous prime is 211350021019. The next prime is 211350021037. The reversal of 211350021020 is 20120053112.

It is a happy number.

211350021020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211350021020.

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 7 ways as a sum of consecutive naturals, for example, 257771 + ... + 699389.

It is an arithmetic number, because the mean of its divisors is an integer number (18493941550).

Almost surely, 2^211350021020 is an apocalyptic number.

211350021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211350021020 is an abundant number, since it is smaller than the sum of its proper divisors (232504576180).

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

211350021020 is a wasteful number, since it uses less digits than its factorization.

211350021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465557 (or 465555 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 211350021020 its reverse (20120053112), we get a palindrome (231470074132).

The spelling of 211350021020 in words is "two hundred eleven billion, three hundred fifty million, twenty-one thousand, twenty".