121816634 has 8 divisors (see below), whose sum is σ = 185720628. Its totient is φ = 59909760.

The previous prime is 121816613. The next prime is 121816661. The reversal of 121816634 is 436618121.

It can be written as a sum of positive squares in 2 ways, for example, as 118875409 + 2941225 = 10903^2 + 1715^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 121816634.

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 3 ways as a sum of consecutive naturals, for example, 499127 + ... + 499370.

Almost surely, 2^121816634 is an apocalyptic number.

121816634 is a deficient number, since it is larger than the sum of its proper divisors (63903994).

121816634 is an equidigital number, since it uses as much as digits as its factorization.

121816634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998560.

The product of its digits is 6912, while the sum is 32.

The square root of 121816634 is about 11037.0573070905. The cubic root of 121816634 is about 495.7189620411.

The spelling of 121816634 in words is "one hundred twenty-one million, eight hundred sixteen thousand, six hundred thirty-four".