1031232121331 has 4 divisors (see below), whose sum is σ = 1064497673664. Its totient is φ = 997966569000.

The previous prime is 1031232121327. The next prime is 1031232121369. The reversal of 1031232121331 is 1331212321301.

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 1031232121331 - 2² = 1031232121327 is a prime.

It is a super-2 number, since 2×1031232121331² (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 = 1031232121297 and 1031232121306.

It is not an unprimeable number, because it can be changed into a prime (1031232321331) 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, 16632776120 + ... + 16632776181.

It is an arithmetic number, because the mean of its divisors is an integer number (266124418416).

Almost surely, 2^{1031232121331} is an apocalyptic number.

1031232121331 is a deficient number, since it is larger than the sum of its proper divisors (33265552333).

1031232121331 is an equidigital number, since it uses as much as digits as its factorization.

1031232121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33265552332.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1031232121331 its reverse (1331212321301), we get a palindrome (2362444442632).

The spelling of 1031232121331 in words is "one trillion, thirty-one billion, two hundred thirty-two million, one hundred twenty-one thousand, three hundred thirty-one".