211120155 has 32 divisors (see below), whose sum is σ = 375950400. Its totient is φ = 112409856.

The previous prime is 211120139. The next prime is 211120157. The reversal of 211120155 is 551021112.

It is not a de Polignac number, because 211120155 - 2⁴ = 211120139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211120157) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 125661 + ... + 127329.

It is an arithmetic number, because the mean of its divisors is an integer number (11748450).

Almost surely, 2^211120155 is an apocalyptic number.

211120155 is a deficient number, since it is larger than the sum of its proper divisors (164830245).

211120155 is a wasteful number, since it uses less digits than its factorization.

211120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 211120155 is about 14529.9743633635. The cubic root of 211120155 is about 595.4471652076.

Adding to 211120155 its reverse (551021112), we get a palindrome (762141267).

The spelling of 211120155 in words is "two hundred eleven million, one hundred twenty thousand, one hundred fifty-five".