121355244111 has 32 divisors (see below), whose sum is σ = 165672967680. Its totient is φ = 78986404224.

The previous prime is 121355244061. The next prime is 121355244113. The reversal of 121355244111 is 111442553121.

It is not a de Polignac number, because 121355244111 - 2⁶ = 121355244047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355244113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43510705 + ... + 43513493.

It is an arithmetic number, because the mean of its divisors is an integer number (5177280240).

Almost surely, 2^121355244111 is an apocalyptic number.

121355244111 is a deficient number, since it is larger than the sum of its proper divisors (44317723569).

121355244111 is a wasteful number, since it uses less digits than its factorization.

121355244111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095.

The product of its digits is 4800, while the sum is 30.

Adding to 121355244111 its reverse (111442553121), we get a palindrome (232797797232).

The spelling of 121355244111 in words is "one hundred twenty-one billion, three hundred fifty-five million, two hundred forty-four thousand, one hundred eleven".