212222212118178 has 16 divisors (see below), whose sum is σ = 424771675157280. Its totient is φ = 70686195552576.

The previous prime is 212222212118149. The next prime is 212222212118179. The reversal of 212222212118178 is 871811212222212.

It is not an unprimeable number, because it can be changed into a prime (212222212118179) 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 7 ways as a sum of consecutive naturals, for example, 13635446608 + ... + 13635462171.

It is an arithmetic number, because the mean of its divisors is an integer number (26548229697330).

Almost surely, 2^{212222212118178} is an apocalyptic number.

212222212118178 is an abundant number, since it is smaller than the sum of its proper divisors (212549463039102).

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

212222212118178 is a wasteful number, since it uses less digits than its factorization.

212222212118178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27270910081.

The product of its digits is 57344, while the sum is 42.

The spelling of 212222212118178 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twelve million, one hundred eighteen thousand, one hundred seventy-eight".