121699359 has 12 divisors (see below), whose sum is σ = 178768200. Its totient is φ = 79757424.

The previous prime is 121699349. The next prime is 121699367. The reversal of 121699359 is 953996121.

It is a happy number.

It is not a de Polignac number, because 121699359 - 2⁴ = 121699343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121699349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114064 + ... + 115125.

It is an arithmetic number, because the mean of its divisors is an integer number (14897350).

Almost surely, 2^121699359 is an apocalyptic number.

121699359 is a deficient number, since it is larger than the sum of its proper divisors (57068841).

121699359 is a wasteful number, since it uses less digits than its factorization.

121699359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229254 (or 229251 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 121699359 is about 11031.7432439302. The cubic root of 121699359 is about 495.5598318650.

It can be divided in two parts, 12169 and 9359, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 121699359 in words is "one hundred twenty-one million, six hundred ninety-nine thousand, three hundred fifty-nine".