211122021211818 has 8 divisors (see below), whose sum is σ = 422244042423648. Its totient is φ = 70374007070604.

The previous prime is 211122021211817. The next prime is 211122021211819. The reversal of 211122021211818 is 818112120221112.

It is an interprime number because it is at equal distance from previous prime (211122021211817) and next prime (211122021211819).

It is a sphenic number, since it is the product of 3 distinct primes.

211122021211818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (211122021211817) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17593501767646 + ... + 17593501767657.

It is an arithmetic number, because the mean of its divisors is an integer number (52780505302956).

Almost surely, 2^{211122021211818} is an apocalyptic number.

211122021211818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211122021211818 is a wasteful number, since it uses less digits than its factorization.

211122021211818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35187003535308.

The product of its (nonzero) digits is 2048, while the sum is 33.

The spelling of 211122021211818 in words is "two hundred eleven trillion, one hundred twenty-two billion, twenty-one million, two hundred eleven thousand, eight hundred eighteen".