221233220321023 has 4 divisors (see below), whose sum is σ = 221233346844408. Its totient is φ = 221233093797640.

The previous prime is 221233220321011. The next prime is 221233220321051. The reversal of 221233220321023 is 320123022332122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221233220321023 is a prime.

It is a super-2 number, since 2×221233220321023² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221233220320982 and 221233220321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221233220321083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60601573 + ... + 64148398.

It is an arithmetic number, because the mean of its divisors is an integer number (55308336711102).

Almost surely, 2^{221233220321023} is an apocalyptic number.

221233220321023 is a deficient number, since it is larger than the sum of its proper divisors (126523385).

221233220321023 is a wasteful number, since it uses less digits than its factorization.

221233220321023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126523384.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 221233220321023 its reverse (320123022332122), we get a palindrome (541356242653145).

The spelling of 221233220321023 in words is "two hundred twenty-one trillion, two hundred thirty-three billion, two hundred twenty million, three hundred twenty-one thousand, twenty-three".