121820196 has 12 divisors (see below), whose sum is σ = 284247152. Its totient is φ = 40606728.

The previous prime is 121820189. The next prime is 121820203. The reversal of 121820196 is 691028121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121820189) and next prime (121820203).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5075830 + ... + 5075853.

Almost surely, 2^121820196 is an apocalyptic number.

It is an amenable number.

121820196 is an abundant number, since it is smaller than the sum of its proper divisors (162426956).

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

121820196 is a wasteful number, since it uses less digits than its factorization.

121820196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10151690 (or 10151688 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 121820196 is about 11037.2186713864. The cubic root of 121820196 is about 495.7237937122.

The spelling of 121820196 in words is "one hundred twenty-one million, eight hundred twenty thousand, one hundred ninety-six".