211242200072 has 36 divisors (see below), whose sum is σ = 405611813295. Its totient is φ = 103137495888.

The previous prime is 211242200069. The next prime is 211242200101. The reversal of 211242200072 is 270002242112.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 105621100036 + 105621100036 = 324994^2 + 324994^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=324994.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55897079 + ... + 55900857.

Almost surely, 2^211242200072 is an apocalyptic number.

It is an amenable number.

211242200072 is a deficient number, since it is larger than the sum of its proper divisors (194369613223).

211242200072 is an frugal number, since it uses more digits than its factorization.

211242200072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 211242200072 its reverse (270002242112), we get a palindrome (481244442184).

The spelling of 211242200072 in words is "two hundred eleven billion, two hundred forty-two million, two hundred thousand, seventy-two".