1023123332221 has 4 divisors (see below), whose sum is σ = 1025486204092. Its totient is φ = 1020760460352.

The previous prime is 1023123332213. The next prime is 1023123332237. The reversal of 1023123332221 is 1222333213201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117559836900 + 905563495321 = 342870^2 + 951611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023123332221 - 2³ = 1023123332213 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 (1023123338221) 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, 1181435286 + ... + 1181436151.

It is an arithmetic number, because the mean of its divisors is an integer number (256371551023).

Almost surely, 2^{1023123332221} is an apocalyptic number.

It is an amenable number.

1023123332221 is a deficient number, since it is larger than the sum of its proper divisors (2362871871).

1023123332221 is an equidigital number, since it uses as much as digits as its factorization.

1023123332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362871870.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1023123332221 its reverse (1222333213201), we get a palindrome (2245456545422).

The spelling of 1023123332221 in words is "one trillion, twenty-three billion, one hundred twenty-three million, three hundred thirty-two thousand, two hundred twenty-one".