121212196 has 48 divisors (see below), whose sum is σ = 248371200. Its totient is φ = 50688288.

The previous prime is 121212181. The next prime is 121212209. The reversal of 121212196 is 691212121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121212196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394675 + ... + 394981.

It is an arithmetic number, because the mean of its divisors is an integer number (5174400).

Almost surely, 2^121212196 is an apocalyptic number.

It is an amenable number.

121212196 is an abundant number, since it is smaller than the sum of its proper divisors (127159004).

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

121212196 is a wasteful number, since it uses less digits than its factorization.

121212196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 614 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 121212196 is about 11009.6410477363. The cubic root of 121212196 is about 494.8977049439.

The spelling of 121212196 in words is "one hundred twenty-one million, two hundred twelve thousand, one hundred ninety-six".