1111122013 has 4 divisors (see below), whose sum is σ = 1123606620. Its totient is φ = 1098637408.

The previous prime is 1111122011. The next prime is 1111122041. The reversal of 1111122013 is 3102211111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 208600249 + 902521764 = 14443^2 + 30042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111122013 - 2¹ = 1111122011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111121984 and 1111122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111122011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6242170 + ... + 6242347.

It is an arithmetic number, because the mean of its divisors is an integer number (280901655).

Almost surely, 2^1111122013 is an apocalyptic number.

It is an amenable number.

1111122013 is a deficient number, since it is larger than the sum of its proper divisors (12484607).

1111122013 is an equidigital number, since it uses as much as digits as its factorization.

1111122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12484606.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1111122013 is about 33333.4968612655. The cubic root of 1111122013 is about 1035.7475561106.

Adding to 1111122013 its reverse (3102211111), we get a palindrome (4213333124).

It can be divided in two parts, 11111 and 22013, that added together give a square (33124 = 182²).

The spelling of 1111122013 in words is "one billion, one hundred eleven million, one hundred twenty-two thousand, thirteen".