212200122178 has 12 divisors (see below), whose sum is σ = 349867143990. Its totient is φ = 96454600880.

The previous prime is 212200122163. The next prime is 212200122179. The reversal of 212200122178 is 871221002212.

It can be written as a sum of positive squares in only one way, i.e., 135524850769 + 76675271409 = 368137^2 + 276903^2 .

It is not an unprimeable number, because it can be changed into a prime (212200122179) 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 5 ways as a sum of consecutive naturals, for example, 438429763 + ... + 438430246.

Almost surely, 2^212200122178 is an apocalyptic number.

212200122178 is a deficient number, since it is larger than the sum of its proper divisors (137667021812).

212200122178 is a wasteful number, since it uses less digits than its factorization.

212200122178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876860033 (or 876860022 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The spelling of 212200122178 in words is "two hundred twelve billion, two hundred million, one hundred twenty-two thousand, one hundred seventy-eight".