1321022221223 has 4 divisors (see below), whose sum is σ = 1366574711640. Its totient is φ = 1275469730808.

The previous prime is 1321022221219. The next prime is 1321022221229. The reversal of 1321022221223 is 3221222201231.

It is a happy number.

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 1321022221223 - 2² = 1321022221219 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 (1321022221229) 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, 22776245165 + ... + 22776245222.

It is an arithmetic number, because the mean of its divisors is an integer number (341643677910).

Almost surely, 2^{1321022221223} is an apocalyptic number.

1321022221223 is a deficient number, since it is larger than the sum of its proper divisors (45552490417).

1321022221223 is an equidigital number, since it uses as much as digits as its factorization.

1321022221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45552490416.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1321022221223 its reverse (3221222201231), we get a palindrome (4542244422454).

The spelling of 1321022221223 in words is "one trillion, three hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty-three".