1311210231 has 8 divisors (see below), whose sum is σ = 1748621424. Its totient is φ = 873969600.

The previous prime is 1311210169. The next prime is 1311210239. The reversal of 1311210231 is 1320121131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311210231 - 2¹⁵ = 1311177463 is a prime.

It is a super-2 number, since 2×1311210231² = 3438544539758146722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1311210231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311210239) 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, 23470 + ... + 56331.

It is an arithmetic number, because the mean of its divisors is an integer number (218577678).

Almost surely, 2^1311210231 is an apocalyptic number.

1311210231 is a deficient number, since it is larger than the sum of its proper divisors (437411193).

1311210231 is an equidigital number, since it uses as much as digits as its factorization.

1311210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85281.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1311210231 is about 36210.6369869407. The cubic root of 1311210231 is about 1094.5210281923.

Adding to 1311210231 its reverse (1320121131), we get a palindrome (2631331362).

The spelling of 1311210231 in words is "one billion, three hundred eleven million, two hundred ten thousand, two hundred thirty-one".