121120243 has 4 divisors (see below), whose sum is σ = 121152400. Its totient is φ = 121088088.

The previous prime is 121120229. The next prime is 121120253. The reversal of 121120243 is 342021121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121120243 is a prime.

It is a super-2 number, since 2×121120243² = 29340226528758098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121120253) 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, 9543 + ... + 18256.

It is an arithmetic number, because the mean of its divisors is an integer number (30288100).

Almost surely, 2^121120243 is an apocalyptic number.

121120243 is a deficient number, since it is larger than the sum of its proper divisors (32157).

121120243 is an equidigital number, since it uses as much as digits as its factorization.

121120243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32156.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121120243 is about 11005.4642337341. The cubic root of 121120243 is about 494.7725282084.

Adding to 121120243 its reverse (342021121), we get a palindrome (463141364).

The spelling of 121120243 in words is "one hundred twenty-one million, one hundred twenty thousand, two hundred forty-three".