1131231013 has 24 divisors (see below), whose sum is σ = 1297195776. Its totient is φ = 977323200.

The previous prime is 1131230999. The next prime is 1131231053. The reversal of 1131231013 is 3101321311.

It is not a de Polignac number, because 1131231013 - 2¹³ = 1131222821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131231053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1186545 + ... + 1187497.

It is an arithmetic number, because the mean of its divisors is an integer number (54049824).

Almost surely, 2^1131231013 is an apocalyptic number.

It is an amenable number.

1131231013 is a deficient number, since it is larger than the sum of its proper divisors (165964763).

1131231013 is an equidigital number, since it uses as much as digits as its factorization.

1131231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1131231013 is about 33633.7778579808. Note that the first 3 decimals coincide. The cubic root of 1131231013 is about 1041.9585298537.

Adding to 1131231013 its reverse (3101321311), we get a palindrome (4232552324).

The spelling of 1131231013 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, thirteen".