221122220021323 has 4 divisors (see below), whose sum is σ = 234129409434360. Its totient is φ = 208115030608288.

The previous prime is 221122220021279. The next prime is 221122220021333. The reversal of 221122220021323 is 323120022221122.

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 221122220021323 - 2⁴⁵ = 185937847932491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221122220021333) 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, 6503594706493 + ... + 6503594706526.

It is an arithmetic number, because the mean of its divisors is an integer number (58532352358590).

Almost surely, 2^{221122220021323} is an apocalyptic number.

221122220021323 is a deficient number, since it is larger than the sum of its proper divisors (13007189413037).

221122220021323 is a wasteful number, since it uses less digits than its factorization.

221122220021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13007189413036.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221122220021323 its reverse (323120022221122), we get a palindrome (544242242242445).

The spelling of 221122220021323 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, twenty-one thousand, three hundred twenty-three".