212210651155 has 4 divisors (see below), whose sum is σ = 254652781392. Its totient is φ = 169768520920.

The previous prime is 212210651153. The next prime is 212210651167. The reversal of 212210651155 is 551156012212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212210651155 - 2¹ = 212210651153 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212210651153) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21221065111 + ... + 21221065120.

It is an arithmetic number, because the mean of its divisors is an integer number (63663195348).

Almost surely, 2^212210651155 is an apocalyptic number.

212210651155 is a deficient number, since it is larger than the sum of its proper divisors (42442130237).

212210651155 is an equidigital number, since it uses as much as digits as its factorization.

212210651155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42442130236.

The product of its (nonzero) digits is 6000, while the sum is 31.

Adding to 212210651155 its reverse (551156012212), we get a palindrome (763366663367).

The spelling of 212210651155 in words is "two hundred twelve billion, two hundred ten million, six hundred fifty-one thousand, one hundred fifty-five".