121533601 has 8 divisors (see below), whose sum is σ = 139317824. Its totient is φ = 103854960.

The previous prime is 121533487. The next prime is 121533613. The reversal of 121533601 is 106335121.

It is a happy number.

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 121533601 - 2¹⁵ = 121500833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121533631) 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, 23910 + ... + 28543.

It is an arithmetic number, because the mean of its divisors is an integer number (17414728).

Almost surely, 2^121533601 is an apocalyptic number.

It is an amenable number.

121533601 is a deficient number, since it is larger than the sum of its proper divisors (17784223).

121533601 is an equidigital number, since it uses as much as digits as its factorization.

121533601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52791.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 121533601 is about 11024.2279094728. The cubic root of 121533601 is about 495.3347407628.

Adding to 121533601 its reverse (106335121), we get a palindrome (227868722).

The spelling of 121533601 in words is "one hundred twenty-one million, five hundred thirty-three thousand, six hundred one".