121244431111 has 8 divisors (see below), whose sum is σ = 125952715904. Its totient is φ = 116585969760.

The previous prime is 121244431057. The next prime is 121244431151. The reversal of 121244431111 is 111134442121.

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 121244431111 - 2¹³ = 121244422919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244431151) 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, 12450900 + ... + 12460633.

It is an arithmetic number, because the mean of its divisors is an integer number (15744089488).

Almost surely, 2^121244431111 is an apocalyptic number.

121244431111 is a deficient number, since it is larger than the sum of its proper divisors (4708284793).

121244431111 is a wasteful number, since it uses less digits than its factorization.

121244431111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24911721.

The product of its digits is 768, while the sum is 25.

Adding to 121244431111 its reverse (111134442121), we get a palindrome (232378873232).

The spelling of 121244431111 in words is "one hundred twenty-one billion, two hundred forty-four million, four hundred thirty-one thousand, one hundred eleven".