121240111 has 8 divisors (see below), whose sum is σ = 122111264. Its totient is φ = 120372480.

The previous prime is 121240099. The next prime is 121240129. The reversal of 121240111 is 111042121.

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 121240111 - 2²⁵ = 87685679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121240091 and 121240100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240181) 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, 116851 + ... + 117883.

It is an arithmetic number, because the mean of its divisors is an integer number (15263908).

Almost surely, 2^121240111 is an apocalyptic number.

121240111 is a deficient number, since it is larger than the sum of its proper divisors (871153).

121240111 is a wasteful number, since it uses less digits than its factorization.

121240111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 121240111 is about 11010.9087272577. The cubic root of 121240111 is about 494.9356934453.

Adding to 121240111 its reverse (111042121), we get a palindrome (232282232).

The spelling of 121240111 in words is "one hundred twenty-one million, two hundred forty thousand, one hundred eleven".