1023203231321 has 4 divisors (see below), whose sum is σ = 1024207357200. Its totient is φ = 1022199105444.

The previous prime is 1023203231311. The next prime is 1023203231357. The reversal of 1023203231321 is 1231323023201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1023203231321 - 2¹⁰ = 1023203230297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023203231311) 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, 502061411 + ... + 502063448.

It is an arithmetic number, because the mean of its divisors is an integer number (256051839300).

Almost surely, 2^{1023203231321} is an apocalyptic number.

It is an amenable number.

1023203231321 is a deficient number, since it is larger than the sum of its proper divisors (1004125879).

1023203231321 is a wasteful number, since it uses less digits than its factorization.

1023203231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004125878.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1023203231321 its reverse (1231323023201), we get a palindrome (2254526254522).

The spelling of 1023203231321 in words is "one trillion, twenty-three billion, two hundred three million, two hundred thirty-one thousand, three hundred twenty-one".