1331101231 has 4 divisors (see below), whose sum is σ = 1331419192. Its totient is φ = 1330783272.

The previous prime is 1331101229. The next prime is 1331101253. The reversal of 1331101231 is 1321011331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331101231 - 2¹ = 1331101229 is a prime.

It is a super-2 number, since 2×1331101231² = 3543660974339430722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331102231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152616 + ... + 161101.

It is an arithmetic number, because the mean of its divisors is an integer number (332854798).

Almost surely, 2^1331101231 is an apocalyptic number.

1331101231 is a deficient number, since it is larger than the sum of its proper divisors (317961).

1331101231 is an equidigital number, since it uses as much as digits as its factorization.

1331101231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317960.

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

The square root of 1331101231 is about 36484.2600445726. The cubic root of 1331101231 is about 1100.0278866209.

Adding to 1331101231 its reverse (1321011331), we get a palindrome (2652112562).

The spelling of 1331101231 in words is "one billion, three hundred thirty-one million, one hundred one thousand, two hundred thirty-one".