1011311232331 has 4 divisors (see below), whose sum is σ = 1012180804632. Its totient is φ = 1010441660032.

The previous prime is 1011311232307. The next prime is 1011311232389. The reversal of 1011311232331 is 1332321131101.

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 1011311232331 - 2¹⁷ = 1011311101259 is a prime.

It is a super-2 number, since 2×1011311232331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011311232431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434784406 + ... + 434786731.

It is an arithmetic number, because the mean of its divisors is an integer number (253045201158).

Almost surely, 2^{1011311232331} is an apocalyptic number.

1011311232331 is a deficient number, since it is larger than the sum of its proper divisors (869572301).

1011311232331 is an equidigital number, since it uses as much as digits as its factorization.

1011311232331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869572300.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1011311232331 its reverse (1332321131101), we get a palindrome (2343632363432).

The spelling of 1011311232331 in words is "one trillion, eleven billion, three hundred eleven million, two hundred thirty-two thousand, three hundred thirty-one".