121242111 has 8 divisors (see below), whose sum is σ = 164706480. Its totient is φ = 79302912.

The previous prime is 121242101. The next prime is 121242137. The reversal of 121242111 is 111242121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121242111 - 2⁶ = 121242047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121242101) 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, 381106 + ... + 381423.

It is an arithmetic number, because the mean of its divisors is an integer number (20588310).

Almost surely, 2^121242111 is an apocalyptic number.

121242111 is a deficient number, since it is larger than the sum of its proper divisors (43464369).

121242111 is an equidigital number, since it uses as much as digits as its factorization.

121242111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762585.

The product of its digits is 32, while the sum is 15.

The square root of 121242111 is about 11010.9995459086. Note that the first 3 decimals coincide. The cubic root of 121242111 is about 494.9384149482.

Adding to 121242111 its reverse (111242121), we get a palindrome (232484232).

The spelling of 121242111 in words is "one hundred twenty-one million, two hundred forty-two thousand, one hundred eleven".