1311231010 has 16 divisors (see below), whose sum is σ = 2373861816. Its totient is φ = 521459968.

The previous prime is 1311231001. The next prime is 1311231011. The reversal of 1311231010 is 101321131.

It can be written as a sum of positive squares in 4 ways, for example, as 1278134001 + 33097009 = 35751^2 + 5753^2 .

It is not an unprimeable number, because it can be changed into a prime (1311231011) 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, 377239 + ... + 380698.

Almost surely, 2^1311231010 is an apocalyptic number.

1311231010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311231010 is a deficient number, since it is larger than the sum of its proper divisors (1062630806).

1311231010 is a wasteful number, since it uses less digits than its factorization.

1311231010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758117.

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

The square root of 1311231010 is about 36210.9239042585. The cubic root of 1311231010 is about 1094.5268098567.

Adding to 1311231010 its reverse (101321131), we get a palindrome (1412552141).

The spelling of 1311231010 in words is "one billion, three hundred eleven million, two hundred thirty-one thousand, ten".