121705633 has 16 divisors (see below), whose sum is σ = 141111936. Its totient is φ = 102816000.

The previous prime is 121705603. The next prime is 121705651. The reversal of 121705633 is 336507121.

It is a de Polignac number, because none of the positive numbers 2^k-121705633 is a prime.

It is a super-2 number, since 2×121705633² = 29624522207861378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121705603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198235 + ... + 198847.

It is an arithmetic number, because the mean of its divisors is an integer number (8819496).

Almost surely, 2^121705633 is an apocalyptic number.

It is an amenable number.

121705633 is a deficient number, since it is larger than the sum of its proper divisors (19406303).

121705633 is a wasteful number, since it uses less digits than its factorization.

121705633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 121705633 is about 11032.0276014883. The cubic root of 121705633 is about 495.5683476287.

The spelling of 121705633 in words is "one hundred twenty-one million, seven hundred five thousand, six hundred thirty-three".