1320100023221 has 4 divisors (see below), whose sum is σ = 1508685740832. Its totient is φ = 1131514305612.

The previous prime is 1320100023217. The next prime is 1320100023247. The reversal of 1320100023221 is 1223200010231.

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 1320100023221 - 2² = 1320100023217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320100023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320100023251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94292858795 + ... + 94292858808.

It is an arithmetic number, because the mean of its divisors is an integer number (377171435208).

Almost surely, 2^{1320100023221} is an apocalyptic number.

It is an amenable number.

1320100023221 is a deficient number, since it is larger than the sum of its proper divisors (188585717611).

1320100023221 is an equidigital number, since it uses as much as digits as its factorization.

1320100023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188585717610.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1320100023221 its reverse (1223200010231), we get a palindrome (2543300033452).

The spelling of 1320100023221 in words is "one trillion, three hundred twenty billion, one hundred million, twenty-three thousand, two hundred twenty-one".