1001231131231 has 4 divisors (see below), whose sum is σ = 1001344825872. Its totient is φ = 1001117436592.

The previous prime is 1001231131189. The next prime is 1001231131261. The reversal of 1001231131231 is 1321311321001.

1001231131231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1001231131231 - 2²³ = 1001222742623 is a prime.

It is a super-2 number, since 2×1001231131231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001231131199 and 1001231131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001231131261) 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, 56834110 + ... + 56851723.

It is an arithmetic number, because the mean of its divisors is an integer number (250336206468).

Almost surely, 2^{1001231131231} is an apocalyptic number.

1001231131231 is a deficient number, since it is larger than the sum of its proper divisors (113694641).

1001231131231 is an equidigital number, since it uses as much as digits as its factorization.

1001231131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113694640.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1001231131231 its reverse (1321311321001), we get a palindrome (2322542452232).

The spelling of 1001231131231 in words is "one trillion, one billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-one".