1231131013 has 8 divisors (see below), whose sum is σ = 1415640128. Its totient is φ = 1048780224.

The previous prime is 1231130987. The next prime is 1231131029. The reversal of 1231131013 is 3101311321.

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 1231131013 - 2⁹ = 1231130501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231131073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538356 + ... + 540637.

It is an arithmetic number, because the mean of its divisors is an integer number (176955016).

Almost surely, 2^1231131013 is an apocalyptic number.

It is an amenable number.

1231131013 is a deficient number, since it is larger than the sum of its proper divisors (184509115).

1231131013 is a wasteful number, since it uses less digits than its factorization.

1231131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079163.

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

The square root of 1231131013 is about 35087.4765835333. The cubic root of 1231131013 is about 1071.7695739629.

Adding to 1231131013 its reverse (3101311321), we get a palindrome (4332442334).

The spelling of 1231131013 in words is "one billion, two hundred thirty-one million, one hundred thirty-one thousand, thirteen".