121111302311 has 16 divisors (see below), whose sum is σ = 129278903040. Its totient is φ = 113128551360.

The previous prime is 121111302281. The next prime is 121111302329. The reversal of 121111302311 is 113203111121.

It is a cyclic number.

It is not a de Polignac number, because 121111302311 - 2¹⁰ = 121111301287 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 121111302311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111302371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716891 + ... + 869571.

It is an arithmetic number, because the mean of its divisors is an integer number (8079931440).

Almost surely, 2^121111302311 is an apocalyptic number.

121111302311 is a deficient number, since it is larger than the sum of its proper divisors (8167600729).

121111302311 is a wasteful number, since it uses less digits than its factorization.

121111302311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153286.

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

Adding to 121111302311 its reverse (113203111121), we get a palindrome (234314413432).

The spelling of 121111302311 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred two thousand, three hundred eleven".