211355500551012 has 36 divisors (see below), whose sum is σ = 534300160870476. Its totient is φ = 70446502963200.

The previous prime is 211355500550923. The next prime is 211355500551059. The reversal of 211355500551012 is 210155005553112.

211355500551012 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 55 + 50 + 0 + 551 + 0 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30206081952036 + 181149418598976 = 5496006^2 + 13459176^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×211355500551012² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 221623989 + ... + 222575612.

It is an arithmetic number, because the mean of its divisors is an integer number (14841671135291).

Almost surely, 2^{211355500551012} is an apocalyptic number.

It is an amenable number.

211355500551012 is an abundant number, since it is smaller than the sum of its proper divisors (322944660319464).

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

211355500551012 is a wasteful number, since it uses less digits than its factorization.

211355500551012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444212828 (or 444212823 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 36.

The spelling of 211355500551012 in words is "two hundred eleven trillion, three hundred fifty-five billion, five hundred million, five hundred fifty-one thousand, twelve".