121799651 has 8 divisors (see below), whose sum is σ = 131195904. Its totient is φ = 112745160.

The previous prime is 121799647. The next prime is 121799669. The reversal of 121799651 is 156997121.

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

It is a cyclic number.

It is not a de Polignac number, because 121799651 - 2² = 121799647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121799599 and 121799608.

It is not an unprimeable number, because it can be changed into a prime (121799621) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 84701 + ... + 86126.

It is an arithmetic number, because the mean of its divisors is an integer number (16399488).

Almost surely, 2^121799651 is an apocalyptic number.

121799651 is a deficient number, since it is larger than the sum of its proper divisors (9396253).

121799651 is a wasteful number, since it uses less digits than its factorization.

121799651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170881.

The product of its digits is 34020, while the sum is 41.

The square root of 121799651 is about 11036.2879175926. The cubic root of 121799651 is about 495.6959241736.

The spelling of 121799651 in words is "one hundred twenty-one million, seven hundred ninety-nine thousand, six hundred fifty-one".