121243633 has 4 divisors (see below), whose sum is σ = 138564160. Its totient is φ = 103923108.

The previous prime is 121243627. The next prime is 121243657. The reversal of 121243633 is 336342121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121243633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121243598 and 121243607.

It is not an unprimeable number, because it can be changed into a prime (121243613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8660253 + ... + 8660266.

It is an arithmetic number, because the mean of its divisors is an integer number (34641040).

Almost surely, 2^121243633 is an apocalyptic number.

It is an amenable number.

121243633 is a deficient number, since it is larger than the sum of its proper divisors (17320527).

121243633 is an equidigital number, since it uses as much as digits as its factorization.

121243633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17320526.

The product of its digits is 2592, while the sum is 25.

The square root of 121243633 is about 11011.0686584001. The cubic root of 121243633 is about 494.9404859919.

Adding to 121243633 its reverse (336342121), we get a palindrome (457585754).

The spelling of 121243633 in words is "one hundred twenty-one million, two hundred forty-three thousand, six hundred thirty-three".