1023031321331 has 4 divisors (see below), whose sum is σ = 1026258549792. Its totient is φ = 1019804092872.

The previous prime is 1023031321309. The next prime is 1023031321363. The reversal of 1023031321331 is 1331231303201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023031321331 is a prime.

It is a super-2 number, since 2×1023031321331² (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 = 1023031321297 and 1023031321306.

It is not an unprimeable number, because it can be changed into a prime (1023031341331) 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, 1613613755 + ... + 1613614388.

It is an arithmetic number, because the mean of its divisors is an integer number (256564637448).

Almost surely, 2^{1023031321331} is an apocalyptic number.

1023031321331 is a deficient number, since it is larger than the sum of its proper divisors (3227228461).

1023031321331 is an equidigital number, since it uses as much as digits as its factorization.

1023031321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227228460.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1023031321331 its reverse (1331231303201), we get a palindrome (2354262624532).

The spelling of 1023031321331 in words is "one trillion, twenty-three billion, thirty-one million, three hundred twenty-one thousand, three hundred thirty-one".