1023211221323 has 4 divisors (see below), whose sum is σ = 1023532887888. Its totient is φ = 1022889554760.

The previous prime is 1023211221311. The next prime is 1023211221359. The reversal of 1023211221323 is 3231221123201.

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 1023211221323 - 2¹⁸ = 1023210959179 is a prime.

It is a super-2 number, since 2×1023211221323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023211220323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160828511 + ... + 160834872.

It is an arithmetic number, because the mean of its divisors is an integer number (255883221972).

Almost surely, 2^{1023211221323} is an apocalyptic number.

1023211221323 is a deficient number, since it is larger than the sum of its proper divisors (321666565).

1023211221323 is an equidigital number, since it uses as much as digits as its factorization.

1023211221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321666564.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1023211221323 its reverse (3231221123201), we get a palindrome (4254432344524).

The spelling of 1023211221323 in words is "one trillion, twenty-three billion, two hundred eleven million, two hundred twenty-one thousand, three hundred twenty-three".