1111121113 has 2 divisors, whose sum is σ = 1111121114. Its totient is φ = 1111121112.

The previous prime is 1111121087. The next prime is 1111121117. The reversal of 1111121113 is 3111211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 959264784 + 151856329 = 30972^2 + 12323^2 .

It is an emirp because it is prime and its reverse (3111211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111121113 - 2²⁵ = 1077566681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111121093 and 1111121102.

It is not a weakly prime, because it can be changed into another prime (1111121117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555560556 + 555560557.

It is an arithmetic number, because the mean of its divisors is an integer number (555560557).

Almost surely, 2^1111121113 is an apocalyptic number.

It is an amenable number.

1111121113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111121113 is an equidigital number, since it uses as much as digits as its factorization.

1111121113 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1111121113 is about 33333.4833613290. The cubic root of 1111121113 is about 1035.7472764614.

Adding to 1111121113 its reverse (3111211111), we get a palindrome (4222332224).

It can be divided in two parts, 111112 and 1113, that added together give a square (112225 = 335²).

The spelling of 1111121113 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred thirteen".