1031031221323 has 4 divisors (see below), whose sum is σ = 1031033908728. Its totient is φ = 1031028533920.

The previous prime is 1031031221267. The next prime is 1031031221347. The reversal of 1031031221323 is 3231221301301.

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-1031031221323 is a prime.

It is a super-3 number, since 3×1031031221323³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031031221294 and 1031031221303.

It is not an unprimeable number, because it can be changed into a prime (1031031921323) 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, 648238 + ... + 1575523.

It is an arithmetic number, because the mean of its divisors is an integer number (257758477182).

Almost surely, 2^{1031031221323} is an apocalyptic number.

1031031221323 is a deficient number, since it is larger than the sum of its proper divisors (2687405).

1031031221323 is an equidigital number, since it uses as much as digits as its factorization.

1031031221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687404.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1031031221323 its reverse (3231221301301), we get a palindrome (4262252522624).

The spelling of 1031031221323 in words is "one trillion, thirty-one billion, thirty-one million, two hundred twenty-one thousand, three hundred twenty-three".