1212212112198 has 64 divisors (see below), whose sum is σ = 2571824908800. Its totient is φ = 380232285440.

The previous prime is 1212212112193. The next prime is 1212212112269. The reversal of 1212212112198 is 8912112122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212112191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6926293 + ... + 7099151.

It is an arithmetic number, because the mean of its divisors is an integer number (40184764200).

Almost surely, 2^{1212212112198} is an apocalyptic number.

1212212112198 is an abundant number, since it is smaller than the sum of its proper divisors (1359612796602).

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

1212212112198 is a wasteful number, since it uses less digits than its factorization.

1212212112198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173917.

The product of its digits is 2304, while the sum is 33.

The spelling of 1212212112198 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred twelve thousand, one hundred ninety-eight".