1000331231231 has 4 divisors (see below), whose sum is σ = 1000476995232. Its totient is φ = 1000185467232.

The previous prime is 1000331231213. The next prime is 1000331231243. The reversal of 1000331231231 is 1321321330001.

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 1000331231231 - 2¹⁴ = 1000331214847 is a prime.

It is a super-2 number, since 2×1000331231231² (a number of 25 digits) 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 (1000331231531) 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, 72871706 + ... + 72885431.

It is an arithmetic number, because the mean of its divisors is an integer number (250119248808).

Almost surely, 2^{1000331231231} is an apocalyptic number.

1000331231231 is a deficient number, since it is larger than the sum of its proper divisors (145764001).

1000331231231 is an equidigital number, since it uses as much as digits as its factorization.

1000331231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145764000.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1000331231231 its reverse (1321321330001), we get a palindrome (2321652561232).

The spelling of 1000331231231 in words is "one trillion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".