221311222023 has 16 divisors (see below), whose sum is σ = 305999123456. Its totient is φ = 142159497120.

The previous prime is 221311222019. The next prime is 221311222141. The reversal of 221311222023 is 320222113122.

It is not a de Polignac number, because 221311222023 - 2² = 221311222019 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 (221311222423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9667183 + ... + 9690048.

It is an arithmetic number, because the mean of its divisors is an integer number (19124945216).

Almost surely, 2^221311222023 is an apocalyptic number.

221311222023 is a deficient number, since it is larger than the sum of its proper divisors (84687901433).

221311222023 is a wasteful number, since it uses less digits than its factorization.

221311222023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357374.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221311222023 its reverse (320222113122), we get a palindrome (541533335145).

The spelling of 221311222023 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred twenty-two thousand, twenty-three".