212021121198 has 8 divisors (see below), whose sum is σ = 424042242408. Its totient is φ = 70673707064.

The previous prime is 212021121187. The next prime is 212021121199. The reversal of 212021121198 is 891121120212.

212021121198 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

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

212021121198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121199) 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, 17668426761 + ... + 17668426772.

It is an arithmetic number, because the mean of its divisors is an integer number (53005280301).

Almost surely, 2^212021121198 is an apocalyptic number.

212021121198 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.

212021121198 is a wasteful number, since it uses less digits than its factorization.

212021121198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35336853538.

The product of its (nonzero) digits is 1152, while the sum is 30.

The spelling of 212021121198 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred ninety-eight".