121111230311 has 4 divisors (see below), whose sum is σ = 125018044224. Its totient is φ = 117204416400.

The previous prime is 121111230293. The next prime is 121111230319. The reversal of 121111230311 is 113032111121.

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

It is a cyclic number.

It is not a de Polignac number, because 121111230311 - 2¹⁰ = 121111229287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121111230311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111230319) 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, 1953406910 + ... + 1953406971.

It is an arithmetic number, because the mean of its divisors is an integer number (31254511056).

Almost surely, 2^121111230311 is an apocalyptic number.

121111230311 is a deficient number, since it is larger than the sum of its proper divisors (3906813913).

121111230311 is an equidigital number, since it uses as much as digits as its factorization.

121111230311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906813912.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 121111230311 its reverse (113032111121), we get a palindrome (234143341432).

The spelling of 121111230311 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred thirty thousand, three hundred eleven".