211330155205 has 16 divisors (see below), whose sum is σ = 273303483264. Its totient is φ = 155944964160.

The previous prime is 211330155203. The next prime is 211330155227. The reversal of 211330155205 is 502551033112.

It is not a de Polignac number, because 211330155205 - 2¹ = 211330155203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211330155203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1100331 + ... + 1278040.

It is an arithmetic number, because the mean of its divisors is an integer number (17081467704).

Almost surely, 2^211330155205 is an apocalyptic number.

It is an amenable number.

211330155205 is a deficient number, since it is larger than the sum of its proper divisors (61973328059).

211330155205 is a wasteful number, since it uses less digits than its factorization.

211330155205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379756.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 211330155205 its reverse (502551033112), we get a palindrome (713881188317).

The spelling of 211330155205 in words is "two hundred eleven billion, three hundred thirty million, one hundred fifty-five thousand, two hundred five".