1013321221023 has 4 divisors (see below), whose sum is σ = 1351094961368. Its totient is φ = 675547480680.

The previous prime is 1013321220997. The next prime is 1013321221051. The reversal of 1013321221023 is 3201221233101.

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

It is not a de Polignac number, because 1013321221023 - 2¹² = 1013321216927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013321221723) 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, 168886870168 + ... + 168886870173.

It is an arithmetic number, because the mean of its divisors is an integer number (337773740342).

Almost surely, 2^{1013321221023} is an apocalyptic number.

1013321221023 is a deficient number, since it is larger than the sum of its proper divisors (337773740345).

1013321221023 is an equidigital number, since it uses as much as digits as its factorization.

1013321221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337773740344.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1013321221023 its reverse (3201221233101), we get a palindrome (4214542454124).

The spelling of 1013321221023 in words is "one trillion, thirteen billion, three hundred twenty-one million, two hundred twenty-one thousand, twenty-three".