1111121311 has 8 divisors (see below), whose sum is σ = 1169922800. Its totient is φ = 1052352000.

The previous prime is 1111121267. The next prime is 1111121327. The reversal of 1111121311 is 1131211111.

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 1111121311 - 2¹³ = 1111113119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111121291 and 1111121300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111121351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100561 + ... + 111061.

It is an arithmetic number, because the mean of its divisors is an integer number (146240350).

Almost surely, 2^1111121311 is an apocalyptic number.

1111121311 is a deficient number, since it is larger than the sum of its proper divisors (58801489).

1111121311 is a wasteful number, since it uses less digits than its factorization.

1111121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16089.

The product of its digits is 6, while the sum is 13.

The square root of 1111121311 is about 33333.4863313155. The cubic root of 1111121311 is about 1035.7473379842.

Adding to 1111121311 its reverse (1131211111), we get a palindrome (2242332422).

The spelling of 1111121311 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, three hundred eleven".