1320203323021 has 4 divisors (see below), whose sum is σ = 1440221806944. Its totient is φ = 1200184839100.

The previous prime is 1320203323001. The next prime is 1320203323081. The reversal of 1320203323021 is 1203233020231.

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 1320203323021 - 2¹⁵ = 1320203290253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320203322983 and 1320203323001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320203323001) 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, 60009241945 + ... + 60009241966.

It is an arithmetic number, because the mean of its divisors is an integer number (360055451736).

Almost surely, 2^{1320203323021} is an apocalyptic number.

1320203323021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1320203323021 is a deficient number, since it is larger than the sum of its proper divisors (120018483923).

1320203323021 is a wasteful number, since it uses less digits than its factorization.

1320203323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120018483922.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 1320203323021 its reverse (1203233020231), we get a palindrome (2523436343252).

The spelling of 1320203323021 in words is "one trillion, three hundred twenty billion, two hundred three million, three hundred twenty-three thousand, twenty-one".