121394479197 has 8 divisors (see below), whose sum is σ = 161930649760. Its totient is φ = 80893980720.

The previous prime is 121394479139. The next prime is 121394479253. The reversal of 121394479197 is 791974493121.

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

It is not a de Polignac number, because 121394479197 - 2⁶ = 121394479133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121394479097) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8910079 + ... + 8923692.

It is an arithmetic number, because the mean of its divisors is an integer number (20241331220).

Almost surely, 2^121394479197 is an apocalyptic number.

It is an amenable number.

121394479197 is a deficient number, since it is larger than the sum of its proper divisors (40536170563).

121394479197 is a wasteful number, since it uses less digits than its factorization.

121394479197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17836043.

The product of its digits is 3429216, while the sum is 57.

The spelling of 121394479197 in words is "one hundred twenty-one billion, three hundred ninety-four million, four hundred seventy-nine thousand, one hundred ninety-seven".