1231001322031 has 4 divisors (see below), whose sum is σ = 1325693731432. Its totient is φ = 1136308912632.

The previous prime is 1231001322029. The next prime is 1231001322043. The reversal of 1231001322031 is 1302231001321.

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 1231001322031 - 2¹ = 1231001322029 is a prime.

It is a super-2 number, since 2×1231001322031² (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 (1231001322731) 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, 47346204681 + ... + 47346204706.

It is an arithmetic number, because the mean of its divisors is an integer number (331423432858).

Almost surely, 2^{1231001322031} is an apocalyptic number.

1231001322031 is a deficient number, since it is larger than the sum of its proper divisors (94692409401).

1231001322031 is an equidigital number, since it uses as much as digits as its factorization.

1231001322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94692409400.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1231001322031 its reverse (1302231001321), we get a palindrome (2533232323352).

The spelling of 1231001322031 in words is "one trillion, two hundred thirty-one billion, one million, three hundred twenty-two thousand, thirty-one".