211235134220 has 48 divisors (see below), whose sum is σ = 484435226016. Its totient is φ = 76731072000.

The previous prime is 211235134207. The next prime is 211235134237. The reversal of 211235134220 is 22431532112.

It is a self number, because there is not a number n which added to its sum of digits gives 211235134220.

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, 303161 + ... + 717200.

It is an arithmetic number, because the mean of its divisors is an integer number (10092400542).

Almost surely, 2^211235134220 is an apocalyptic number.

211235134220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211235134220 is an abundant number, since it is smaller than the sum of its proper divisors (273200091796).

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

211235134220 is a wasteful number, since it uses less digits than its factorization.

211235134220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021322 (or 1021320 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 211235134220 its reverse (22431532112), we get a palindrome (233666666332).

The spelling of 211235134220 in words is "two hundred eleven billion, two hundred thirty-five million, one hundred thirty-four thousand, two hundred twenty".