1131012013 has 4 divisors (see below), whose sum is σ = 1141388380. Its totient is φ = 1120635648.

The previous prime is 1131012011. The next prime is 1131012017. The reversal of 1131012013 is 3102101311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3102101311 = 20123 ⋅154157.

It can be written as a sum of positive squares in 2 ways, for example, as 268238884 + 862773129 = 16378^2 + 29373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131012013 - 2¹ = 1131012011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131011984 and 1131012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131012011) 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 3 ways as a sum of consecutive naturals, for example, 5188020 + ... + 5188237.

It is an arithmetic number, because the mean of its divisors is an integer number (285347095).

Almost surely, 2^1131012013 is an apocalyptic number.

It is an amenable number.

1131012013 is a deficient number, since it is larger than the sum of its proper divisors (10376367).

1131012013 is a wasteful number, since it uses less digits than its factorization.

1131012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10376366.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1131012013 is about 33630.5220447141. The cubic root of 1131012013 is about 1041.8912863987.

Adding to 1131012013 its reverse (3102101311), we get a palindrome (4233113324).

The spelling of 1131012013 in words is "one billion, one hundred thirty-one million, twelve thousand, thirteen".