211115220145 has 32 divisors (see below), whose sum is σ = 268553864448. Its totient is φ = 158986426368.

The previous prime is 211115220139. The next prime is 211115220221. The reversal of 211115220145 is 541022511112.

211115220145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211115220145 - 2¹⁵ = 211115187377 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 8439897 + ... + 8464873.

It is an arithmetic number, because the mean of its divisors is an integer number (8392308264).

Almost surely, 2^211115220145 is an apocalyptic number.

It is an amenable number.

211115220145 is a deficient number, since it is larger than the sum of its proper divisors (57438644303).

211115220145 is a wasteful number, since it uses less digits than its factorization.

211115220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26169.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 211115220145 its reverse (541022511112), we get a palindrome (752137731257).

The spelling of 211115220145 in words is "two hundred eleven billion, one hundred fifteen million, two hundred twenty thousand, one hundred forty-five".