212121212194 has 32 divisors (see below), whose sum is σ = 336046838400. Its totient is φ = 100143296640.

The previous prime is 212121212183. The next prime is 212121212209. The reversal of 212121212194 is 491212121212.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22330854 + ... + 22340350.

It is an arithmetic number, because the mean of its divisors is an integer number (10501463700).

Almost surely, 2^212121212194 is an apocalyptic number.

212121212194 is a deficient number, since it is larger than the sum of its proper divisors (123925626206).

212121212194 is a wasteful number, since it uses less digits than its factorization.

212121212194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11418.

The product of its digits is 1152, while the sum is 28.

The spelling of 212121212194 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred ninety-four".