121561733 has 8 divisors (see below), whose sum is σ = 123721728. Its totient is φ = 119420784.

The previous prime is 121561721. The next prime is 121561789. The reversal of 121561733 is 337165121.

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 121561733 - 2⁶ = 121561669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121561696 and 121561705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121561703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8435 + ... + 17727.

It is an arithmetic number, because the mean of its divisors is an integer number (15465216).

Almost surely, 2^121561733 is an apocalyptic number.

It is an amenable number.

121561733 is a deficient number, since it is larger than the sum of its proper divisors (2159995).

121561733 is a wasteful number, since it uses less digits than its factorization.

121561733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523.

The product of its digits is 3780, while the sum is 29.

The square root of 121561733 is about 11025.5037526636. The cubic root of 121561733 is about 495.3729570304.

The spelling of 121561733 in words is "one hundred twenty-one million, five hundred sixty-one thousand, seven hundred thirty-three".